1 files changed, 79 insertions, 0 deletions
diff --git a/config/c-library.m4 b/config/c-library.m4
new file mode 100644
index 00000000000..2c0d555f06e
--- /dev/null
+++ b/config/c-library.m4
@@ -0,0 +1,79 @@
+# Macros that test various C library quirks
+# $Header: /cvsroot/pgsql/config/c-library.m4,v 1.1 2000/06/11 11:39:46 petere Exp $
+
+
+# PGAC_VAR_INT_TIMEZONE
+# ---------------------
+# Check if the global variable `timezone' exists. If so, define
+# HAVE_INT_TIMEZONE.
+AC_DEFUN([PGAC_VAR_INT_TIMEZONE],
+[AC_CACHE_CHECK(for int timezone, pgac_cv_var_int_timezone,
+[AC_TRY_LINK([#include <time.h>],
+  [int res = timezone / 60;],
+  [pgac_cv_var_int_timezone=yes],
+  [pgac_cv_var_int_timezone=no])])
+if test x"$pgac_cv_var_int_timezone" = xyes ; then
+  AC_DEFINE(HAVE_INT_TIMEZONE,, [Set to 1 if you have the global variable timezone])
+fi])# PGAC_VAR_INT_TIMEZONE
+
+
+# PGAC_FUNC_GETTIMEOFDAY_1ARG
+# ---------------------------
+# Check if gettimeofday() has only one arguments. (Normal is two.)
+# If so, define GETTIMEOFDAY_1ARG.
+AC_DEFUN([PGAC_FUNC_GETTIMEOFDAY_1ARG],
+[AC_CACHE_CHECK(whether gettimeofday takes only one argument,
+pgac_cv_func_gettimeofday_1arg,
+[AC_TRY_COMPILE([#include <sys/time.h>],
+[struct timeval *tp;
+struct timezone *tzp;
+gettimeofday(tp,tzp);],
+[pgac_cv_func_gettimeofday_1arg=no],
+[pgac_cv_func_gettimeofday_1arg=yes])])
+if test x"$pgac_cv_func_gettimeofday_1arg" = xyes ; then
+  AC_DEFINE(GETTIMEOFDAY_1ARG,, [Set to 1 if gettimeofday() takes only 1 argument])
+fi])# PGAC_FUNC_GETTIMEOFDAY_1ARG
+
+
+# PGAC_UNION_SEMUN
+# ----------------
+# Check if `union semun' exists. Define HAVE_UNION_SEMUN if so.
+# If it doesn't then one could define it as
+# union semun { int val; struct semid_ds *buf; unsigned short *array; }
+AC_DEFUN([PGAC_UNION_SEMUN],
+[AC_CACHE_CHECK(for union semun, pgac_cv_union_semun,
+[AC_TRY_COMPILE([#include <sys/types.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>],
+  [union semun semun;],
+  [pgac_cv_union_semun=yes],
+  [pgac_cv_union_semun=no])])
+if test x"$pgac_cv_union_semun" = xyes ; then
+  AC_DEFINE(HAVE_UNION_SEMUN,, [Set to 1 if you have `union semun'])
+fi])# PGAC_UNION_SEMUN
+
+
+# PGAC_FUNC_POSIX_SIGNALS
+# -----------------------
+# Check to see if the machine has the POSIX signal interface. Define
+# HAVE_POSIX_SIGNALS if so. Also set the output variable HAVE_POSIX_SIGNALS
+# to yes or no.
+#
+# Note that this test only compiles a test program, it doesn't check
+# whether the routines actually work. If that becomes a problem, make
+# a fancier check.
+AC_DEFUN([PGAC_FUNC_POSIX_SIGNALS],
+[AC_CACHE_CHECK(for POSIX signal interface, pgac_cv_func_posix_signals,
+[AC_TRY_LINK([#include <signal.h>
+],
+[struct sigaction act, oact;
+sigemptyset(&act.sa_mask);
+act.sa_flags = SA_RESTART;
+sigaction(0, &act, &oact);],
+[pgac_cv_func_posix_signals=yes],
+[pgac_cv_func_posix_signals=no])])
+if test x"$pgac_cv_func_posix_signals" = xyes ; then
+  AC_DEFINE(HAVE_POSIX_SIGNALS,, [Set to 1 if you have the POSIX signal interface])
+fi
+HAVE_POSIX_SIGNALS=$pgac_cv_func_posix_signals
+AC_SUBST(HAVE_POSIX_SIGNALS)])# PGAC_FUNC_POSIX_SIGNALS