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meson: Move C99 test earlier

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Move the test for compiler options for C99 earlier in meson.build,
before we make use of the compiler for other tests.  That way, if any
command-line options are needed, subsequent tests will also use them.
This is at the moment a theoretical problem, but it seems better to
get this correct.  It also matches the order in the Autoconf-based
build more closely.

Discussion: https://www.postgresql.org/message-id/flat/01a69441-af54-4822-891b-ca28e05b215a@eisentraut.org
This commit is contained in:
Peter Eisentraut
2025-08-18 07:35:55 +02:00
parent ba3d93b2e8
commit 4a4038068b
1 changed files with 42 additions and 43 deletions
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85
meson.build
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@@ -550,6 +550,48 @@ dir_doc_extension = dir_doc / 'extension'
# used, they need to be added to test_c_args as well.
###############################################################
# Do we need -std=c99 to compile C99 code? We don't want to add -std=c99
# unnecessarily, because we optionally rely on newer features.
c99_test = '''
#include <stdbool.h>
#include <complex.h>
#include <tgmath.h>
#include <inttypes.h>
struct named_init_test {
int a;
int b;
};
extern void structfunc(struct named_init_test);
int main(int argc, char **argv)
{
struct named_init_test nit = {
.a = 3,
.b = 5,
};
for (int loop_var = 0; loop_var < 3; loop_var++)
{
nit.a += nit.b;
}
structfunc((struct named_init_test){1, 0});
return nit.a != 0;
}
'''
if not cc.compiles(c99_test, name: 'c99')
if cc.compiles(c99_test, name: 'c99 with -std=c99', args: ['-std=c99'])
cflags += '-std=c99'
else
error('C compiler does not support C99')
endif
endif
postgres_inc = [include_directories(postgres_inc_d)]
test_lib_d = postgres_lib_d
test_c_args = cppflags + cflags
@@ -1704,49 +1746,6 @@ endif
# Compiler tests
###############################################################
# Do we need -std=c99 to compile C99 code? We don't want to add -std=c99
# unnecessarily, because we optionally rely on newer features.
c99_test = '''
#include <stdbool.h>
#include <complex.h>
#include <tgmath.h>
#include <inttypes.h>
struct named_init_test {
int a;
int b;
};
extern void structfunc(struct named_init_test);
int main(int argc, char **argv)
{
struct named_init_test nit = {
.a = 3,
.b = 5,
};
for (int loop_var = 0; loop_var < 3; loop_var++)
{
nit.a += nit.b;
}
structfunc((struct named_init_test){1, 0});
return nit.a != 0;
}
'''
if not cc.compiles(c99_test, name: 'c99', args: test_c_args)
if cc.compiles(c99_test, name: 'c99 with -std=c99',
args: test_c_args + ['-std=c99'])
test_c_args += '-std=c99'
cflags += '-std=c99'
else
error('C compiler does not support C99')
endif
endif
if host_machine.endian() == 'big'
cdata.set('WORDS_BIGENDIAN', 1)
endif