[src/trunk]: src/lib/librumpuser check that sys/cdefs.h builds with -Werror (...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9c0cc81d4543
branches:  trunk
changeset: 335327:9c0cc81d4543
user:      pooka <pooka%NetBSD.org@localhost>
date:      Sat Jan 03 13:16:41 2015 +0000

description:
check that sys/cdefs.h builds with -Werror (not the case on alpine linux
where it contains an unconditional #warning)

diffstat:

 lib/librumpuser/configure    |  17 ++++++++++++++++-
 lib/librumpuser/configure.ac |   7 ++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

diffs (58 lines):

diff -r d43b78a032b5 -r 9c0cc81d4543 lib/librumpuser/configure
--- a/lib/librumpuser/configure Sat Jan 03 11:48:04 2015 +0000
+++ b/lib/librumpuser/configure Sat Jan 03 13:16:41 2015 +0000
@@ -3646,7 +3646,7 @@
 done
 
 
-for ac_header in sys/cdefs.h sys/param.h sys/sysctl.h sys/disk.h \
+for ac_header in sys/param.h sys/sysctl.h sys/disk.h \
        sys/disklabel.h sys/dkio.h sys/atomic.h paths.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
@@ -4096,6 +4096,21 @@
 
 SAVE_CFLAGS="${CFLAGS}"
 CFLAGS="${SAVE_CFLAGS} -Werror"
+
+for ac_header in sys/cdefs.h
+do :
+  ac_fn_c_check_header_compile "$LINENO" "sys/cdefs.h" "ac_cv_header_sys_cdefs_h" "#include <sys/cdefs.h>
+"
+if test "x$ac_cv_header_sys_cdefs_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYS_CDEFS_H 1
+_ACEOF
+
+fi
+
+done
+
+
 SAVE_LIBS="${LIBS}"
 LIBS="${LIBS} -lpthread"
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for two-argument pthread_setname_np()" >&5
diff -r d43b78a032b5 -r 9c0cc81d4543 lib/librumpuser/configure.ac
--- a/lib/librumpuser/configure.ac      Sat Jan 03 11:48:04 2015 +0000
+++ b/lib/librumpuser/configure.ac      Sat Jan 03 13:16:41 2015 +0000
@@ -19,7 +19,7 @@
 
 AC_SYS_LARGEFILE
 
-AC_CHECK_HEADERS([sys/cdefs.h sys/param.h sys/sysctl.h sys/disk.h \
+AC_CHECK_HEADERS([sys/param.h sys/sysctl.h sys/disk.h \
        sys/disklabel.h sys/dkio.h sys/atomic.h paths.h])
 
 AC_CANONICAL_TARGET
@@ -52,6 +52,11 @@
 dnl
 SAVE_CFLAGS="${CFLAGS}"
 CFLAGS="${SAVE_CFLAGS} -Werror"
+
+dnl check sys/cdefs.h creatively to process only with cc, not cpp
+dnl (sys/cdefs.h in at least in musl contains a #warning)
+AC_CHECK_HEADERS([sys/cdefs.h], [], [], [#include <sys/cdefs.h>])
+
 SAVE_LIBS="${LIBS}"
 LIBS="${LIBS} -lpthread"
 AC_MSG_CHECKING([for two-argument pthread_setname_np()])