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Issue #396: check for toolchain compatibilty with _REENTRANT before adding it to CFLAGS.

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This commit is contained in:
Eric Haszlakiewicz
2018-03-04 22:32:45 -05:00
parent 33e166a685
commit 0f814e52dd
1 changed files with 22 additions and 1 deletions
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23
configure.ac
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@@ -167,7 +167,28 @@ AC_SUBST(JSON_BSYMBOLIC_LDFLAGS)
AX_APPEND_COMPILE_FLAGS([-Wall -Werror -Wcast-qual -Wno-error=deprecated-declarations]) AX_APPEND_COMPILE_FLAGS([-Wall -Werror -Wcast-qual -Wno-error=deprecated-declarations])
AX_APPEND_COMPILE_FLAGS([-Wextra -Wwrite-string -Wno-unused-parameter]) AX_APPEND_COMPILE_FLAGS([-Wextra -Wwrite-string -Wno-unused-parameter])
AX_APPEND_COMPILE_FLAGS([-D_GNU_SOURCE -D_REENTRANT]) AX_APPEND_COMPILE_FLAGS([-D_GNU_SOURCE])
AC_LANG_PUSH([C])
AC_MSG_CHECKING([for compatibility with _REENTRANT and toolchain headers])
AC_LINK_IFELSE(
[
AC_LANG_SOURCE([[
/* uClibc toolchains without threading barf when _REENTRANT is defined */
#define _REENTRANT 1
#include <sys/types.h>
int main ()
{
return 0;
}
]])], [
AC_MSG_RESULT(yes)
AX_APPEND_COMPILE_FLAGS([-D_REENTRANT])
], [
AC_MSG_RESULT(no)
])
AC_LANG_POP([C])
AX_COMPILE_CHECK_SIZEOF(int) AX_COMPILE_CHECK_SIZEOF(int)
AX_COMPILE_CHECK_SIZEOF(long) AX_COMPILE_CHECK_SIZEOF(long)