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ccan: update to have new configurator.

Browse Source 
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-06-06 13:04:27 +09:30
committed by Christian Decker
parent 76dd1577bd
commit d395b58ffa
4 changed files with 623 additions and 117 deletions
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216
ccan/tools/configurator/configurator.1 Normal file
View File

@@ -0,0 +1,216 @@
'\" t
.\" Title: configurator
.\" Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\" Date: 03/01/2018
.\" Manual: \ \&
.\" Source: \ \&
.\" Language: English
.\"
.TH "CONFIGURATOR" "1" "03/01/2018" "\ \&" "\ \&"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
configurator \- Generate a simple config\&.h or variable file
.SH "SYNOPSIS"
.sp
\fBconfigurator\fR [\fIOPTIONS\fR] [\fICC\fR] [\fICFLAGS\fR\&...]
.SH "DESCRIPTION"
.sp
\fBconfigurator\fR is a standalone C program which evaluates the C environment using code snippets\&.
.sp
The C compiler (and flags) can be provided on the command\-line, otherwise built\-in defaults are used\&.
.sp
It has a builtin set of tests, to which more can be added\&. By default it produces a C header file to standard output, but it can also produce a file containing simple "key=value" lines suitable for parsing by \fBsh\fR or \fBmake\fR\&.
.SH "OPTIONS"
.PP
\fB\-v\fR
.RS 4
Print out every test result; specified twice, print out each test too\&.
.RE
.PP
\fB\-vv\fR
.RS 4
Shortcut for two
\fB\-v\fR
options\&.
.RE
.PP
\fB\-\-var\-file=<file>\fR
.RS 4
Output results in format
\fI<key>=<value>\fR
to
\fI<file>\fR, or stdout if
\fI<file>\fR
is
\fI\-\fR\&. Default is not to output this\&.
.RE
.PP
\fB\-\-header\-file=<file>\fR
.RS 4
Output C\-style header to
\fI<file>\fR
instead out stdout\&.
.RE
.PP
\fB\-\-autotools\-style\fR
.RS 4
Produce output to stdout like autotools\*(Aq configure script\&. This usually means you want to use
\fB\-\-header\-file\fR
so that doesn\(cqt mix with stdout\&.
.RE
.PP
\fB\-O<outflag>\fR
.RS 4
Override option to set compiler output file\&.
.RE
.PP
\fB\-\-configurator\-cc=<command>\fR
.RS 4
This gives the real compiler command to use for tests, instead of the first commandline argument or the default\&.
.RE
.PP
\fB\-\-extra\-tests\fR
.RS 4
Read additional tests from stdin, see
\fIEXTRA TESTS\fR
below\&.
.RE
.SH "OUTPUT"
.sp
The header output is \fI#ifndef/#define\fR idempotent\-wrapped using \fICCAN_CONFIG_H\fR, and defines \fI_GNU_SOURCE\fR\&. It also defines \fICCAN_COMPILER\fR, \fICCAN_CFLAGS\fR and \fICCAN_OUTPUT_EXE_CFLAG\fR as either the built\-in definitions or those provided on the command line\&. The remainder is \fI#define\fR of the test names followed by a \fI0\fR or \fI1\fR: note that this means you should use \fI#if\fR not \fI#ifdef\fR to test features in your C programs!
.sp
The var\-file output is simply the test names followed by \fI=1\fR or \fI=0\fR\&.
.SH "EXTRA TESTS"
.sp
Extra tests must be formatted as \fI<key>=<value>\fR pairs, with leading whitespace and \fI#\fR lines ignored\&.
.sp
The first three lines are always the same:
.PP
\fBvar=<varname>\fR
.RS 4
Define the variable set by the test, e\&.g\&.
\fIvar=HAVE_FOO\fR\&.
.RE
.PP
\fBdesc=<description>\fR
.RS 4
The description printed out with
\fB\-\-autotools\-style\fR, e\&.g\&.
\fIfoo support\fR\&.
.RE
.PP
\fBstyle=<style>\fR
.RS 4
The set of strings defining how to treat the code snippet\&. It must include one of
\fIOUTSIDE_MAIN\fR,
\fIDEFINES_FUNC\fR,
\fIINSIDE_MAIN\fR
or
\fIDEFINES_EVERYTHING\fR
which control the boilerplate to surround the file, and may include
\fIEXECUTE\fR
or both
\fIEXECUTE\fR
and
\fIMAY_NOT_COMPILE\fR\&. e\&.g\&.
\fIINSIDE_MAIN|EXECUTE\fR\&.
.RE
.sp
The following styles are defined:
.PP
\fBOUTSIDE_MAIN\fR
.RS 4
means we put a simple boilerplate main below it\&.
.RE
.PP
\fBDEFINES_FUNC\fR
.RS 4
put a simple boilerplate main below it, which references
\fIfunc\fR
(to avoid any unused warnings)\&.
.RE
.PP
\fBINSIDE_MAIN\fR
.RS 4
put this inside main()\&. This also means it must exit with status 0 if it compiles, unless
\fBEXECUTE\fR
is added\&.
.RE
.PP
\fBDEFINES_EVERYTHING\fR
.RS 4
don\(cqt add any boilerplate at all\&.
.RE
.PP
\fBEXECUTE\fR
.RS 4
this is an execution test; it must compile, but may not exit with status 0 when run\&.
.RE
.PP
\fBMAY_NOT_COMPILE\fR
.RS 4
Only useful with EXECUTE: don\(cqt get upset if it doesn\(cqt compile\&.
.RE
.sp
The following lines are optional, and may follow in any order:
.PP
\fBdepends=<varnames>\fR
.RS 4
A space\-separates set of vars which must pass to even try to pass this one\&. If the var begins with
\fI!\fR
then the dependency must fail to try this one\&. e\&.g\&.
\fIdepends=HAVE_UCONTEXT !HAVE_VALGRIND_MEMCHECK_H\fR\&.
.RE
.PP
\fBlink=<linkargs>\fR
.RS 4
Extra arguments for linking with this test, e\&.g\&.
\fIlink=\-lrt\fR\&.
.RE
.PP
\fBflags=<cflags>\fR
.RS 4
Extra flags for compiling with this test, e\&.g\&.
\fIflags=\-fopenmp\fR\&.
.RE
.PP
\fBoverrides=<varname>\fR
.RS 4
Tests to force passing if this one passes\&. e\&.g\&.
\fIoverrides=HAVE_SOME_FOO\fR\&.
.RE
.sp
The final line is the code to test, itself, either as a single \fIcode=<oneline>\fR or as multiple lines starting with \fIcode=\fR and ending with \fI/*END*/\fR on a line by itself\&. e\&.g\&. \fIcode=return 0;\fR\&.
.SH "EXIT STATUS"
.sp
It will exit with non\-zero status if it has a problem\&. \fB1\fR means bad commandline options\&. \fB2\fR means some operational problem creating and running tests\&. \fB3\fR means a bad test\&. \fB4\fR means failure to parse an extra test\&.
.SH "AUTHOR"
.sp
Rusty Russell wrote \fBconfigurator\fR\&.
.SH "RESOURCES"
.sp
Main web site: http://ccodearchive\&.net/
.sp
Wiki: https://github\&.com/rustyrussell/ccan/wiki/
.SH "COPYING"
.sp
This program is under the MIT\-style BSD license; see code for details\&.

520
ccan/tools/configurator/configurator.c
View File

@@ -26,12 +26,18 @@
*/
#define _POSIX_C_SOURCE 200809L /* For pclose, popen, strdup */
#define EXIT_BAD_USAGE 1
#define EXIT_TROUBLE_RUNNING 2
#define EXIT_BAD_TEST 3
#define EXIT_BAD_INPUT 4
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef _MSC_VER
#define popen _popen
@@ -65,19 +71,31 @@
static const char *progname = "";
static int verbose;
enum test_style {
OUTSIDE_MAIN = 0x1,
DEFINES_FUNC = 0x2,
INSIDE_MAIN = 0x4,
DEFINES_EVERYTHING = 0x8,
MAY_NOT_COMPILE = 0x10,
EXECUTE = 0x8000
};
static bool like_a_libtool = false;
struct test {
const char *name;
enum test_style style;
const char *desc;
/*
* Template style flags (pick one):
* OUTSIDE_MAIN:
* - put a simple boilerplate main below it.
* DEFINES_FUNC:
* - defines a static function called func; adds ref to avoid warnings
* INSIDE_MAIN:
* - put this inside main().
* DEFINES_EVERYTHING:
* - don't add any boilerplate at all.
*
* Execution flags:
* EXECUTE:
* - a runtime test; must compile, exit 0 means flag is set.
* MAY_NOT_COMPILE:
* - Only useful with EXECUTE: don't get upset if it doesn't compile.
* <nothing>:
* - a compile test, if it compiles must run and exit 0.
*/
const char *style;
const char *depends;
const char *link;
const char *fragment;
@@ -87,15 +105,21 @@ struct test {
bool answer;
};
static struct test tests[] = {
{ "HAVE_32BIT_OFF_T", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
/* Terminated by a NULL name */
static struct test *tests;
static const struct test base_tests[] = {
{ "HAVE_32BIT_OFF_T", "off_t is 32 bits",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#include <sys/types.h>\n"
"int main(void) {\n"
" return sizeof(off_t) == 4 ? 0 : 1;\n"
"}\n" },
{ "HAVE_ALIGNOF", INSIDE_MAIN, NULL, NULL,
{ "HAVE_ALIGNOF", "__alignof__ support",
"INSIDE_MAIN", NULL, NULL,
"return __alignof__(double) > 0 ? 0 : 1;" },
{ "HAVE_ASPRINTF", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ASPRINTF", "asprintf() declaration",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
@@ -106,85 +130,114 @@ static struct test tests[] = {
" p = NULL;\n"
" return p;\n"
"}" },
{ "HAVE_ATTRIBUTE_COLD", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ATTRIBUTE_COLD", "__attribute__((cold)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((cold)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_CONST", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ATTRIBUTE_CONST", "__attribute__((const)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((const)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_PURE", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ATTRIBUTE_PURE", "__attribute__((pure)) support",
"DEFINES_FUNC", NULL, NULL,
"static int __attribute__((pure)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_MAY_ALIAS", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_ATTRIBUTE_MAY_ALIAS", "__attribute__((may_alias)) support",
"OUTSIDE_MAIN", NULL, NULL,
"typedef short __attribute__((__may_alias__)) short_a;" },
{ "HAVE_ATTRIBUTE_NORETURN", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ATTRIBUTE_NORETURN", "__attribute__((noreturn)) support",
"DEFINES_FUNC", NULL, NULL,
"#include <stdlib.h>\n"
"static void __attribute__((noreturn)) func(int x) { exit(x); }" },
{ "HAVE_ATTRIBUTE_PRINTF", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ATTRIBUTE_PRINTF", "__attribute__ format printf support",
"DEFINES_FUNC", NULL, NULL,
"static void __attribute__((format(__printf__, 1, 2))) func(const char *fmt, ...) { (void)fmt; }" },
{ "HAVE_ATTRIBUTE_UNUSED", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_ATTRIBUTE_UNUSED", "__attribute__((unused)) support",
"OUTSIDE_MAIN", NULL, NULL,
"static int __attribute__((unused)) func(int x) { return x; }" },
{ "HAVE_ATTRIBUTE_USED", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_ATTRIBUTE_USED", "__attribute__((used)) support",
"OUTSIDE_MAIN", NULL, NULL,
"static int __attribute__((used)) func(int x) { return x; }" },
{ "HAVE_BACKTRACE", DEFINES_FUNC, NULL, NULL,
{ "HAVE_BACKTRACE", "backtrace() in <execinfo.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <execinfo.h>\n"
"static int func(int x) {"
" void *bt[10];\n"
" return backtrace(bt, 10) < x;\n"
"}" },
{ "HAVE_BIG_ENDIAN", INSIDE_MAIN|EXECUTE, NULL, NULL,
{ "HAVE_BIG_ENDIAN", "big endian",
"INSIDE_MAIN|EXECUTE", NULL, NULL,
"union { int i; char c[sizeof(int)]; } u;\n"
"u.i = 0x01020304;\n"
"return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;" },
{ "HAVE_BSWAP_64", DEFINES_FUNC, "HAVE_BYTESWAP_H", NULL,
{ "HAVE_BSWAP_64", "bswap64 in byteswap.h",
"DEFINES_FUNC", "HAVE_BYTESWAP_H", NULL,
"#include <byteswap.h>\n"
"static int func(int x) { return bswap_64(x); }" },
{ "HAVE_BUILTIN_CHOOSE_EXPR", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CHOOSE_EXPR", "__builtin_choose_expr support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_choose_expr(1, 0, \"garbage\");" },
{ "HAVE_BUILTIN_CLZ", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CLZ", "__builtin_clz support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CLZL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CLZL", "__builtin_clzl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_clzl(1) == (sizeof(long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CLZLL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CLZLL", "__builtin_clzll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_clzll(1) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CTZ", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CTZ", "__builtin_ctz support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ctz(1 << (sizeof(int)*8 - 1)) == (sizeof(int)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CTZL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CTZL", "__builtin_ctzl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ctzl(1UL << (sizeof(long)*8 - 1)) == (sizeof(long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CTZLL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CTZLL", "__builtin_ctzll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ctzll(1ULL << (sizeof(long long)*8 - 1)) == (sizeof(long long)*8 - 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_CONSTANT_P", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_CONSTANT_P", "__builtin_constant_p support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_constant_p(1) ? 0 : 1;" },
{ "HAVE_BUILTIN_EXPECT", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_EXPECT", "__builtin_expect support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_expect(argc == 1, 1) ? 0 : 1;" },
{ "HAVE_BUILTIN_FFS", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_FFS", "__builtin_ffs support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ffs(0) == 0 ? 0 : 1;" },
{ "HAVE_BUILTIN_FFSL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_FFSL", "__builtin_ffsl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ffsl(0L) == 0 ? 0 : 1;" },
{ "HAVE_BUILTIN_FFSLL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_FFSLL", "__builtin_ffsll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_ffsll(0LL) == 0 ? 0 : 1;" },
{ "HAVE_BUILTIN_POPCOUNT", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_POPCOUNT", "__builtin_popcount support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_popcount(255) == 8 ? 0 : 1;" },
{ "HAVE_BUILTIN_POPCOUNTL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_POPCOUNTL", "__builtin_popcountl support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_popcountl(255L) == 8 ? 0 : 1;" },
{ "HAVE_BUILTIN_POPCOUNTLL", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_POPCOUNTLL", "__builtin_popcountll support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_popcountll(255LL) == 8 ? 0 : 1;" },
{ "HAVE_BUILTIN_TYPES_COMPATIBLE_P", INSIDE_MAIN, NULL, NULL,
{ "HAVE_BUILTIN_TYPES_COMPATIBLE_P", "__builtin_types_compatible_p support",
"INSIDE_MAIN", NULL, NULL,
"return __builtin_types_compatible_p(char *, int) ? 1 : 0;" },
{ "HAVE_ICCARM_INTRINSICS", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ICCARM_INTRINSICS", "<intrinsics.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <intrinsics.h>\n"
"int func(int v) {\n"
" return __CLZ(__RBIT(v));\n"
"}" },
{ "HAVE_BYTESWAP_H", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_BYTESWAP_H", "<byteswap.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <byteswap.h>\n" },
{ "HAVE_CLOCK_GETTIME",
DEFINES_FUNC, "HAVE_STRUCT_TIMESPEC", NULL,
{ "HAVE_CLOCK_GETTIME", "clock_gettime() declaration",
"DEFINES_FUNC", "HAVE_STRUCT_TIMESPEC", NULL,
"#include <time.h>\n"
"static struct timespec func(void) {\n"
" struct timespec ts;\n"
" clock_gettime(CLOCK_REALTIME, &ts);\n"
" return ts;\n"
"}\n" },
{ "HAVE_CLOCK_GETTIME_IN_LIBRT",
DEFINES_FUNC,
{ "HAVE_CLOCK_GETTIME_IN_LIBRT", "clock_gettime() in librt",
"DEFINES_FUNC",
"HAVE_STRUCT_TIMESPEC !HAVE_CLOCK_GETTIME",
"-lrt",
"#include <time.h>\n"
@@ -195,10 +248,12 @@ static struct test tests[] = {
"}\n",
/* This means HAVE_CLOCK_GETTIME, too */
"HAVE_CLOCK_GETTIME" },
{ "HAVE_COMPOUND_LITERALS", INSIDE_MAIN, NULL, NULL,
{ "HAVE_COMPOUND_LITERALS", "compound literal support",
"INSIDE_MAIN", NULL, NULL,
"int *foo = (int[]) { 1, 2, 3, 4 };\n"
"return foo[0] ? 0 : 1;" },
{ "HAVE_FCHDIR", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
{ "HAVE_FCHDIR", "fchdir support",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#include <sys/types.h>\n"
"#include <sys/stat.h>\n"
"#include <fcntl.h>\n"
@@ -207,7 +262,8 @@ static struct test tests[] = {
" int fd = open(\"..\", O_RDONLY);\n"
" return fchdir(fd) == 0 ? 0 : 1;\n"
"}\n" },
{ "HAVE_ERR_H", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ERR_H", "<err.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <err.h>\n"
"static void func(int arg) {\n"
" if (arg == 0)\n"
@@ -219,33 +275,40 @@ static struct test tests[] = {
" if (arg == 4)\n"
" warnx(\"warn %u\", arg);\n"
"}\n" },
{ "HAVE_FILE_OFFSET_BITS", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE,
{ "HAVE_FILE_OFFSET_BITS", "_FILE_OFFSET_BITS to get 64-bit offsets",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
"HAVE_32BIT_OFF_T", NULL,
"#define _FILE_OFFSET_BITS 64\n"
"#include <sys/types.h>\n"
"int main(void) {\n"
" return sizeof(off_t) == 8 ? 0 : 1;\n"
"}\n" },
{ "HAVE_FOR_LOOP_DECLARATION", INSIDE_MAIN, NULL, NULL,
{ "HAVE_FOR_LOOP_DECLARATION", "for loop declaration support",
"INSIDE_MAIN", NULL, NULL,
"int ret = 1;\n"
"for (int i = 0; i < argc; i++) { ret = 0; };\n"
"return ret;" },
{ "HAVE_FLEXIBLE_ARRAY_MEMBER", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_FLEXIBLE_ARRAY_MEMBER", "flexible array member support",
"OUTSIDE_MAIN", NULL, NULL,
"struct foo { unsigned int x; int arr[]; };" },
{ "HAVE_GETPAGESIZE", DEFINES_FUNC, NULL, NULL,
{ "HAVE_GETPAGESIZE", "getpagesize() in <unistd.h>",
"DEFINES_FUNC", NULL, NULL,
"#include <unistd.h>\n"
"static int func(void) { return getpagesize(); }" },
{ "HAVE_ISBLANK", DEFINES_FUNC, NULL, NULL,
{ "HAVE_ISBLANK", "isblank() in <ctype.h>",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
"#include <ctype.h>\n"
"static int func(void) { return isblank(' '); }" },
{ "HAVE_LITTLE_ENDIAN", INSIDE_MAIN|EXECUTE, NULL, NULL,
{ "HAVE_LITTLE_ENDIAN", "little endian",
"INSIDE_MAIN|EXECUTE", NULL, NULL,
"union { int i; char c[sizeof(int)]; } u;\n"
"u.i = 0x01020304;\n"
"return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;" },
{ "HAVE_MEMMEM", DEFINES_FUNC, NULL, NULL,
{ "HAVE_MEMMEM", "memmem in <string.h>",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
@@ -253,7 +316,8 @@ static struct test tests[] = {
"static void *func(void *h, size_t hl, void *n, size_t nl) {\n"
"return memmem(h, hl, n, nl);"
"}\n", },
{ "HAVE_MEMRCHR", DEFINES_FUNC, NULL, NULL,
{ "HAVE_MEMRCHR", "memrchr in <string.h>",
"DEFINES_FUNC", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
@@ -261,20 +325,22 @@ static struct test tests[] = {
"static void *func(void *s, int c, size_t n) {\n"
"return memrchr(s, c, n);"
"}\n", },
{ "HAVE_MMAP", DEFINES_FUNC, NULL, NULL,
{ "HAVE_MMAP", "mmap() declaration",
"DEFINES_FUNC", NULL, NULL,
"#include <sys/mman.h>\n"
"static void *func(int fd) {\n"
" return mmap(0, 65536, PROT_READ, MAP_SHARED, fd, 0);\n"
"}" },
{ "HAVE_PROC_SELF_MAPS", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
{ "HAVE_PROC_SELF_MAPS", "/proc/self/maps exists",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#include <sys/types.h>\n"
"#include <sys/stat.h>\n"
"#include <fcntl.h>\n"
"int main(void) {\n"
" return open(\"/proc/self/maps\", O_RDONLY) != -1 ? 0 : 1;\n"
"}\n" },
{ "HAVE_QSORT_R_PRIVATE_LAST",
DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE, NULL, NULL,
{ "HAVE_QSORT_R_PRIVATE_LAST", "qsort_r cmp takes trailing arg",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE", NULL, NULL,
"#ifndef _GNU_SOURCE\n"
"#define _GNU_SOURCE\n"
"#endif\n"
@@ -288,21 +354,22 @@ static struct test tests[] = {
" qsort_r(array, 3, sizeof(int), cmp, &called);\n"
" return called && array[0] == 2 && array[1] == 5 && array[2] == 9 ? 0 : 1;\n"
"}\n" },
{ "HAVE_STRUCT_TIMESPEC",
DEFINES_FUNC, NULL, NULL,
{ "HAVE_STRUCT_TIMESPEC", "struct timespec declaration",
"DEFINES_FUNC", NULL, NULL,
"#include <time.h>\n"
"static void func(void) {\n"
" struct timespec ts;\n"
" ts.tv_sec = ts.tv_nsec = 1;\n"
"}\n" },
{ "HAVE_SECTION_START_STOP",
DEFINES_FUNC, NULL, NULL,
{ "HAVE_SECTION_START_STOP", "__attribute__((section)) and __start/__stop",
"DEFINES_FUNC", NULL, NULL,
"static void *__attribute__((__section__(\"mysec\"))) p = &p;\n"
"static int func(void) {\n"
" extern void *__start_mysec[], *__stop_mysec[];\n"
" return __stop_mysec - __start_mysec;\n"
"}\n" },
{ "HAVE_STACK_GROWS_UPWARDS", DEFINES_EVERYTHING|EXECUTE, NULL, NULL,
{ "HAVE_STACK_GROWS_UPWARDS", "stack grows upwards",
"DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
"#include <stddef.h>\n"
"static ptrdiff_t nest(const void *base, unsigned int i)\n"
"{\n"
@@ -314,17 +381,23 @@ static struct test tests[] = {
" (void)argv;\n"
" return (nest(&argc, argc) > 0) ? 0 : 1;\n"
"}\n" },
{ "HAVE_STATEMENT_EXPR", INSIDE_MAIN, NULL, NULL,
{ "HAVE_STATEMENT_EXPR", "statement expression support",
"INSIDE_MAIN", NULL, NULL,
"return ({ int x = argc; x == argc ? 0 : 1; });" },
{ "HAVE_SYS_FILIO_H", OUTSIDE_MAIN, NULL, NULL, /* Solaris needs this for FIONREAD */
{ "HAVE_SYS_FILIO_H", "<sys/filio.h>",
"OUTSIDE_MAIN", NULL, NULL, /* Solaris needs this for FIONREAD */
"#include <sys/filio.h>\n" },
{ "HAVE_SYS_TERMIOS_H", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_SYS_TERMIOS_H", "<sys/termios.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <sys/termios.h>\n" },
{ "HAVE_SYS_UNISTD_H", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_SYS_UNISTD_H", "<sys/unistd.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <sys/unistd.h>\n" },
{ "HAVE_TYPEOF", INSIDE_MAIN, NULL, NULL,
{ "HAVE_TYPEOF", "__typeof__ support",
"INSIDE_MAIN", NULL, NULL,
"__typeof__(argc) i; i = argc; return i == argc ? 0 : 1;" },
{ "HAVE_UNALIGNED_ACCESS", DEFINES_EVERYTHING|EXECUTE, NULL, NULL,
{ "HAVE_UNALIGNED_ACCESS", "unaligned access to int",
"DEFINES_EVERYTHING|EXECUTE", NULL, NULL,
"#include <string.h>\n"
"int main(int argc, char *argv[]) {\n"
" (void)argc;\n"
@@ -333,28 +406,33 @@ static struct test tests[] = {
" int *x = (int *)pad, *y = (int *)(pad + 1);\n"
" return *x == *y;\n"
"}\n" },
{ "HAVE_UTIME", DEFINES_FUNC, NULL, NULL,
{ "HAVE_UTIME", "utime() declaration",
"DEFINES_FUNC", NULL, NULL,
"#include <sys/types.h>\n"
"#include <utime.h>\n"
"static int func(const char *filename) {\n"
" struct utimbuf times = { 0 };\n"
" return utime(filename, &times);\n"
"}" },
{ "HAVE_WARN_UNUSED_RESULT", DEFINES_FUNC, NULL, NULL,
{ "HAVE_WARN_UNUSED_RESULT", "__attribute__((warn_unused_result))",
"DEFINES_FUNC", NULL, NULL,
"#include <sys/types.h>\n"
"#include <utime.h>\n"
"static __attribute__((warn_unused_result)) int func(int i) {\n"
" return i + 1;\n"
"}" },
{ "HAVE_OPENMP", INSIDE_MAIN, NULL, NULL,
{ "HAVE_OPENMP", "#pragma omp and -fopenmp support",
"INSIDE_MAIN", NULL, NULL,
"int i;\n"
"#pragma omp parallel for\n"
"for(i = 0; i < 0; i++) {};\n"
"return 0;\n",
"-Werror -fopenmp" },
{ "HAVE_VALGRIND_MEMCHECK_H", OUTSIDE_MAIN, NULL, NULL,
{ "HAVE_VALGRIND_MEMCHECK_H", "<valgrind/memcheck.h>",
"OUTSIDE_MAIN", NULL, NULL,
"#include <valgrind/memcheck.h>\n" },
{ "HAVE_UCONTEXT", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE,
{ "HAVE_UCONTEXT", "working <ucontext.h",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
NULL, NULL,
"#include <ucontext.h>\n"
"static int x = 0;\n"
@@ -375,7 +453,8 @@ static struct test tests[] = {
" return (x == 3) ? 0 : 1;\n"
"}\n"
},
{ "HAVE_POINTER_SAFE_MAKECONTEXT", DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE,
{ "HAVE_POINTER_SAFE_MAKECONTEXT", "passing pointers via makecontext()",
"DEFINES_EVERYTHING|EXECUTE|MAY_NOT_COMPILE",
"HAVE_UCONTEXT", NULL,
"#include <stddef.h>\n"
"#include <ucontext.h>\n"
@@ -427,6 +506,20 @@ static void c12r_errx(int eval, const char *fmt, ...)
exit(eval);
}
static void start_test(const char *what, const char *why)
{
if (like_a_libtool) {
printf("%s%s... ", what, why);
fflush(stdout);
}
}
static void end_test(bool result)
{
if (like_a_libtool)
printf("%s\n", result ? "yes" : "no");
}
static size_t fcopy(FILE *fsrc, FILE *fdst)
{
char buffer[BUFSIZ];
@@ -456,7 +549,7 @@ static char *grab_stream(FILE *file)
}
size += ret;
if (ferror(file))
c12r_err(1, "reading from command");
c12r_err(EXIT_TROUBLE_RUNNING, "reading from command");
buffer[size] = '\0';
return buffer;
}
@@ -476,7 +569,7 @@ static char *run(const char *cmd, int *exitstatus)
cmdout = popen(cmdredir, "r");
if (!cmdout)
c12r_err(1, "popen \"%s\"", cmdredir);
c12r_err(EXIT_TROUBLE_RUNNING, "popen \"%s\"", cmdredir);
free(cmdredir);
@@ -513,10 +606,11 @@ static struct test *find_test(const char *name)
{
unsigned int i;
for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++) {
for (i = 0; tests[i].name; i++) {
if (strcmp(tests[i].name, name) == 0)
return &tests[i];
}
c12r_errx(EXIT_BAD_TEST, "Unknown test %s", name);
abort();
}
@@ -572,35 +666,30 @@ static bool run_test(const char *cmd, struct test *test)
outf = fopen(INPUT_FILE, verbose > 1 ? "w+" : "w");
if (!outf)
c12r_err(1, "creating %s", INPUT_FILE);
c12r_err(EXIT_TROUBLE_RUNNING, "creating %s", INPUT_FILE);
fprintf(outf, "%s", PRE_BOILERPLATE);
switch (test->style & ~(EXECUTE|MAY_NOT_COMPILE)) {
case INSIDE_MAIN:
if (strstr(test->style, "INSIDE_MAIN")) {
fprintf(outf, "%s", MAIN_START_BOILERPLATE);
fprintf(outf, "%s", test->fragment);
fprintf(outf, "%s", MAIN_END_BOILERPLATE);
break;
case OUTSIDE_MAIN:
} else if (strstr(test->style, "OUTSIDE_MAIN")) {
fprintf(outf, "%s", test->fragment);
fprintf(outf, "%s", MAIN_START_BOILERPLATE);
fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
fprintf(outf, "%s", MAIN_END_BOILERPLATE);
break;
case DEFINES_FUNC:
} else if (strstr(test->style, "DEFINES_FUNC")) {
fprintf(outf, "%s", test->fragment);
fprintf(outf, "%s", MAIN_START_BOILERPLATE);
fprintf(outf, "%s", USE_FUNC_BOILERPLATE);
fprintf(outf, "%s", MAIN_BODY_BOILERPLATE);
fprintf(outf, "%s", MAIN_END_BOILERPLATE);
break;
case DEFINES_EVERYTHING:
} else if (strstr(test->style, "DEFINES_EVERYTHING")) {
fprintf(outf, "%s", test->fragment);
break;
default:
abort();
}
} else
c12r_errx(EXIT_BAD_TEST, "Unknown style for test %s: %s",
test->name, test->style);
if (verbose > 1) {
fseek(outf, 0, SEEK_SET);
@@ -629,6 +718,7 @@ static bool run_test(const char *cmd, struct test *test)
printf("Extra link line: %s", newcmd);
}
start_test("checking for ", test->desc);
output = run(newcmd, &status);
free(newcmd);
@@ -638,8 +728,10 @@ static bool run_test(const char *cmd, struct test *test)
printf("Compile %s for %s, status %i: %s\n",
status ? "fail" : "warning",
test->name, status, output);
if ((test->style & EXECUTE) && !(test->style & MAY_NOT_COMPILE))
c12r_errx(1, "Test for %s did not compile:\n%s",
if (strstr(test->style, "EXECUTE")
&& !strstr(test->style, "MAY_NOT_COMPILE"))
c12r_errx(EXIT_BAD_TEST,
"Test for %s did not compile:\n%s",
test->name, output);
test->answer = false;
free(output);
@@ -647,10 +739,12 @@ static bool run_test(const char *cmd, struct test *test)
/* Compile succeeded. */
free(output);
/* We run INSIDE_MAIN tests for sanity checking. */
if ((test->style & EXECUTE) || (test->style & INSIDE_MAIN)) {
if (strstr(test->style, "EXECUTE")
|| strstr(test->style, "INSIDE_MAIN")) {
output = run("." DIR_SEP OUTPUT_FILE, &status);
if (!(test->style & EXECUTE) && status != 0)
c12r_errx(1, "Test for %s failed with %i:\n%s",
if (!strstr(test->style, "EXECUTE") && status != 0)
c12r_errx(EXIT_BAD_TEST,
"Test for %s failed with %i:\n%s",
test->name, status, output);
if (verbose && status)
printf("%s exited %i\n", test->name, status);
@@ -659,6 +753,7 @@ static bool run_test(const char *cmd, struct test *test)
test->answer = (status == 0);
}
test->done = true;
end_test(test->answer);
if (test->answer && test->overrides) {
struct test *override = find_test(test->overrides);
@@ -668,6 +763,126 @@ static bool run_test(const char *cmd, struct test *test)
return test->answer;
}
static char *any_field(char **fieldname)
{
char buf[1000];
for (;;) {
char *p, *eq;
if (!fgets(buf, sizeof(buf), stdin))
return NULL;
p = buf;
/* Ignore whitespace, lines starting with # */
while (*p == ' ' || *p == '\t')
p++;
if (*p == '#' || *p == '\n')
continue;
eq = strchr(p, '=');
if (!eq)
c12r_errx(EXIT_BAD_INPUT, "no = in line: %s", p);
*eq = '\0';
*fieldname = strdup(p);
p = eq + 1;
if (strlen(p) && p[strlen(p)-1] == '\n')
p[strlen(p)-1] = '\0';
return strdup(p);
}
}
static char *read_field(const char *name, bool compulsory)
{
char *fieldname, *value;
value = any_field(&fieldname);
if (!value) {
if (!compulsory)
return NULL;
c12r_errx(EXIT_BAD_INPUT, "Could not read field %s", name);
}
if (strcmp(fieldname, name) != 0)
c12r_errx(EXIT_BAD_INPUT,
"Expected field %s not %s", name, fieldname);
return value;
}
/* Test descriptions from stdin:
* Lines starting with # or whitespace-only are ignored.
*
* First three non-ignored lines must be:
* var=<varname>
* desc=<description-for-autotools-style>
* style=OUTSIDE_MAIN DEFINES_FUNC INSIDE_MAIN DEFINES_EVERYTHING EXECUTE MAY_NOT_COMPILE
*
* Followed by optional lines:
* depends=<space-separated-testnames, ! to invert>
* link=<extra args for link line>
* flags=<extra args for compile line>
* overrides=<testname-to-force>
*
* Finally a code line, either:
* code=<oneline> OR
* code=
* <lines of code>
* <end-comment>
*
* And <end-comment> looks like this next comment: */
/*END*/
static bool read_test(struct test *test)
{
char *field, *value;
char buf[1000];
memset(test, 0, sizeof(*test));
test->name = read_field("var", false);
if (!test->name)
return false;
test->desc = read_field("desc", true);
test->style = read_field("style", true);
/* Read any optional fields. */
while ((value = any_field(&field)) != NULL) {
if (strcmp(field, "depends") == 0)
test->depends = value;
else if (strcmp(field, "link") == 0)
test->link = value;
else if (strcmp(field, "flags") == 0)
test->flags = value;
else if (strcmp(field, "overrides") == 0)
test->overrides = value;
else if (strcmp(field, "code") == 0)
break;
else
c12r_errx(EXIT_BAD_INPUT, "Unknown field %s in %s",
field, test->name);
}
if (!value)
c12r_errx(EXIT_BAD_INPUT, "Missing code in %s", test->name);
if (strlen(value) == 0) {
/* Multiline program, read to END comment */
while (fgets(buf, sizeof(buf), stdin) != 0) {
size_t n;
if (strncmp(buf, "/*END*/", 7) == 0)
break;
n = strlen(value);
value = realloc(value, n + strlen(buf) + 1);
strcpy(value + n, buf);
n += strlen(buf);
}
}
test->fragment = value;
return true;
}
static void read_tests(size_t num_tests)
{
while (read_test(tests + num_tests)) {
num_tests++;
tests = realloc(tests, num_tests * sizeof(tests[0]));
}
}
int main(int argc, const char *argv[])
{
char *cmd;
@@ -677,13 +892,17 @@ int main(int argc, const char *argv[])
const char *outflag = DEFAULT_OUTPUT_EXE_FLAG;
const char *configurator_cc = NULL;
const char *orig_cc;
const char *varfile = NULL;
const char *headerfile = NULL;
bool extra_tests = false;
FILE *outf;
if (argc > 0)
progname = argv[0];
while (argc > 1) {
if (strcmp(argv[1], "--help") == 0) {
printf("Usage: configurator [-v] [-O<outflag>] [--configurator-cc=<compiler-for-tests>] [<compiler> <flags>...]\n"
printf("Usage: configurator [-v] [--var-file=<filename>] [-O<outflag>] [--configurator-cc=<compiler-for-tests>] [--autotools-style] [--extra-tests] [<compiler> <flags>...]\n"
" <compiler> <flags> will have \"<outflag> <outfile> <infile.c>\" appended\n"
"Default: %s %s %s\n",
DEFAULT_COMPILER, DEFAULT_FLAGS,
@@ -698,7 +917,7 @@ int main(int argc, const char *argv[])
fprintf(stderr,
"%s: option requires an argument -- O\n",
argv[0]);
exit(1);
exit(EXIT_BAD_USAGE);
}
} else if (strcmp(argv[1], "-v") == 0) {
argc--;
@@ -712,6 +931,26 @@ int main(int argc, const char *argv[])
configurator_cc = argv[1] + 18;
argc--;
argv++;
} else if (strncmp(argv[1], "--var-file=", 11) == 0) {
varfile = argv[1] + 11;
argc--;
argv++;
} else if (strcmp(argv[1], "--autotools-style") == 0) {
like_a_libtool = true;
argc--;
argv++;
} else if (strncmp(argv[1], "--header-file=", 14) == 0) {
headerfile = argv[1] + 14;
argc--;
argv++;
} else if (strcmp(argv[1], "--extra-tests") == 0) {
extra_tests = true;
argc--;
argv++;
} else if (strcmp(argv[1], "--") == 0) {
break;
} else if (argv[1][0] == '-') {
c12r_errx(EXIT_BAD_USAGE, "Unknown option %s", argv[1]);
} else {
break;
}
@@ -720,33 +959,84 @@ int main(int argc, const char *argv[])
if (argc == 1)
argv = default_args;
/* Copy with NULL entry at end */
tests = calloc(sizeof(base_tests)/sizeof(base_tests[0]) + 1,
sizeof(base_tests[0]));
memcpy(tests, base_tests, sizeof(base_tests));
if (extra_tests)
read_tests(sizeof(base_tests)/sizeof(base_tests[0]));
orig_cc = argv[1];
if (configurator_cc)
argv[1] = configurator_cc;
cmd = connect_args(argv, outflag, OUTPUT_FILE " " INPUT_FILE);
for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++)
if (like_a_libtool) {
start_test("Making autoconf users comfortable", "");
sleep(1);
end_test(1);
}
for (i = 0; tests[i].name; i++)
run_test(cmd, &tests[i]);
free(cmd);
remove(OUTPUT_FILE);
remove(INPUT_FILE);
printf("/* Generated by CCAN configurator */\n"
if (varfile) {
FILE *vars;
if (strcmp(varfile, "-") == 0)
vars = stdout;
else {
start_test("Writing variables to ", varfile);
vars = fopen(varfile, "a");
if (!vars)
c12r_err(EXIT_TROUBLE_RUNNING,
"Could not open %s", varfile);
}
for (i = 0; tests[i].name; i++)
fprintf(vars, "%s=%u\n", tests[i].name, tests[i].answer);
if (vars != stdout) {
if (fclose(vars) != 0)
c12r_err(EXIT_TROUBLE_RUNNING,
"Closing %s", varfile);
end_test(1);
}
}
if (headerfile) {
start_test("Writing header to ", headerfile);
outf = fopen(headerfile, "w");
if (!outf)
c12r_err(EXIT_TROUBLE_RUNNING,
"Could not open %s", headerfile);
} else
outf = stdout;
fprintf(outf, "/* Generated by CCAN configurator */\n"
"#ifndef CCAN_CONFIG_H\n"
"#define CCAN_CONFIG_H\n");
printf("#ifndef _GNU_SOURCE\n");
printf("#define _GNU_SOURCE /* Always use GNU extensions. */\n");
printf("#endif\n");
printf("#define CCAN_COMPILER \"%s\"\n", orig_cc);
fprintf(outf, "#ifndef _GNU_SOURCE\n");
fprintf(outf, "#define _GNU_SOURCE /* Always use GNU extensions. */\n");
fprintf(outf, "#endif\n");
fprintf(outf, "#define CCAN_COMPILER \"%s\"\n", orig_cc);
cmd = connect_args(argv + 1, "", "");
printf("#define CCAN_CFLAGS \"%s\"\n", cmd);
fprintf(outf, "#define CCAN_CFLAGS \"%s\"\n", cmd);
free(cmd);
printf("#define CCAN_OUTPUT_EXE_CFLAG \"%s\"\n\n", outflag);
fprintf(outf, "#define CCAN_OUTPUT_EXE_CFLAG \"%s\"\n\n", outflag);
/* This one implies "#include <ccan/..." works, eg. for tdb2.h */
printf("#define HAVE_CCAN 1\n");
for (i = 0; i < sizeof(tests)/sizeof(tests[0]); i++)
printf("#define %s %u\n", tests[i].name, tests[i].answer);
printf("#endif /* CCAN_CONFIG_H */\n");
fprintf(outf, "#define HAVE_CCAN 1\n");
for (i = 0; tests[i].name; i++)
fprintf(outf, "#define %s %u\n", tests[i].name, tests[i].answer);
fprintf(outf, "#endif /* CCAN_CONFIG_H */\n");
if (headerfile) {
if (fclose(outf) != 0)
c12r_err(EXIT_TROUBLE_RUNNING, "Closing %s", headerfile);
end_test(1);
}
return 0;
}