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configure: check that errno is threadsafe

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Without `-pthread` specified to the compiler, errno is not threadsafe on
Solaris (as _REENTRANT is undefined, and _POSIX_C_SOURCE may not be set
until after the inclusion of <errno.h>).

Work on #3340.
This commit is contained in:
David Adam 2016-11-26 22:50:37 +08:00
parent 3289797248
commit ee15f1b987
1 changed files with 28 additions and 0 deletions
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28
configure.ac
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@ -536,6 +536,34 @@ else
AC_MSG_RESULT(no)
fi
# Check that threads actually work on Solaris
AC_MSG_CHECKING([for threadsafe errno])
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([
#include <errno.h>
#include <pthread.h>
#include <signal.h>
void *thread1_func(void *p_arg)
{
errno = 1;
return 0;
}
],[
errno = 0;
pthread_t t1;
pthread_create(&t1, NULL, thread1_func, NULL);
pthread_join(t1, NULL);
return errno;
])],
[AC_MSG_RESULT(yes)],
[
AC_MSG_RESULT(no)
AC_MSG_FAILURE([errno is not threadsafe - check your compiler settings])
],
[AC_MSG_RESULT(crosscompiling, skipped)]
)
pcre2_min_version=10.21
EXTRA_PCRE2=
AC_ARG_WITH(