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authorStefan Metzmacher <metze@samba.org>2004-06-01 15:13:27 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 12:56:24 -0500
commit9318fdbb3346da0374ab859055ea399dff86a861 (patch)
treeafd9d22a52e44edd2ab124e4831cff6d39dd0652 /source4/build/smb_build/check_cc.m4
parent63990406aef0118d459b27e89b92f4d31c7a12fd (diff)
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r967: move some configure checks to seperate files
metze (This used to be commit 2d109074e8be712a6eb0cfc76439176e3dcdee3a)
Diffstat (limited to 'source4/build/smb_build/check_cc.m4')
-rw-r--r--source4/build/smb_build/check_cc.m473
1 files changed, 73 insertions, 0 deletions
diff --git a/source4/build/smb_build/check_cc.m4 b/source4/build/smb_build/check_cc.m4
new file mode 100644
index 0000000000..0a430a4fcf
--- /dev/null
+++ b/source4/build/smb_build/check_cc.m4
@@ -0,0 +1,73 @@
+dnl SMB Build Environment CC Checks
+dnl -------------------------------------------------------
+dnl Copyright (C) Stefan (metze) Metzmacher 2004
+dnl Released under the GNU GPL
+dnl -------------------------------------------------------
+dnl
+dnl _SMB_BUILD_CHECK_CC(
+dnl 1:dummy
+dnl )
+
+dnl #######################################################
+dnl ### And now the implementation ###
+dnl #######################################################
+
+dnl _SMB_BUILD_CHECK_CC(
+dnl 1:dummy
+dnl )
+AC_DEFUN([_SMB_BUILD_CHECK_CC],
+[
+ AC_PROG_CC
+ if test x"$CC" = x""; then
+ AC_MSG_WARN([No c compiler was not found!])
+ AC_MSG_ERROR([Please Install gcc from http://gcc.gnu.org/])
+ fi
+
+ AC_PROG_CC_STDC
+
+ # compile with optimization and without debugging by default, but
+ # allow people to set their own preference.
+ if test "x$CFLAGS" = x; then
+ CFLAGS="-O ${CFLAGS}"
+ fi
+
+ dnl needed before AC_TRY_COMPILE
+ AC_ISC_POSIX
+
+ dnl Check if C compiler understands -c and -o at the same time
+ AC_PROG_CC_C_O
+ if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
+ BROKEN_CC=
+ else
+ BROKEN_CC=#
+ fi
+ AC_SUBST(BROKEN_CC)
+
+ AC_CACHE_CHECK([that the C compiler can precompile header files],samba_cv_precompiled_headers, [
+ dnl Check whether the compiler can generate precompiled headers
+ touch conftest.h
+ if ${CC-cc} conftest.h 2> /dev/null && test -f conftest.h.gch; then
+ samba_cv_precompiled_headers=yes
+ else
+ samba_cv_precompiled_headers=no
+ fi])
+ PCH_AVAILABLE="#"
+ if test x"$samba_cv_precompiled_headers" = x"yes"; then
+ PCH_AVAILABLE=""
+ fi
+ AC_SUBST(PCH_AVAILABLE)
+
+
+ dnl Check if the C compiler understands volatile (it should, being ANSI).
+ AC_CACHE_CHECK([that the C compiler understands volatile],samba_cv_volatile, [
+ AC_TRY_COMPILE([#include <sys/types.h>],[volatile int i = 0],
+ samba_cv_volatile=yes,samba_cv_volatile=no)])
+ if test x"$samba_cv_volatile" = x"yes"; then
+ AC_DEFINE(HAVE_VOLATILE, 1, [Whether the C compiler understands volatile])
+ fi
+
+ AC_C_CONST
+ AC_C_INLINE
+
+ AC_PROG_CPP
+])