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| author | Zdenek Kabelac <zkabelac@redhat.com> | 2015-03-10 13:36:55 +0100 |
|---|---|---|
| committer | Zdenek Kabelac <zkabelac@redhat.com> | 2015-03-10 14:10:18 +0100 |
| commit | 0982c5c79f3467bcff1d64ac12cb30b25d446a5a (patch) | |
| tree | 59dccf64ea3495fe207c9926d3470dc774ba0cf3 | |
| parent | 47b704462eea3c93ab5f46d970e5a74a4a5d4e70 (diff) | |
| download | lvm2-0982c5c79f3467bcff1d64ac12cb30b25d446a5a.tar.gz | |
configure: check for sync-nand
Check whether gcc support this flag.
Some older compilers (gcc version 4.3.2) miss it.
| -rwxr-xr-x | configure | 39 | ||||
| -rw-r--r-- | configure.in | 2 | ||||
| -rw-r--r-- | make.tmpl.in | 6 |
3 files changed, 46 insertions, 1 deletions
@@ -749,6 +749,7 @@ CUNIT_CFLAGS GENPNG GENHTML LCOV +HAVE_WSYNCNAND HAVE_WCLOBBERED HAVE_WJUMP SACKPT_LIBS @@ -10214,6 +10215,44 @@ $as_echo "$ac_cv_flag_HAVE_WCLOBBERED" >&6; } + + ac_save_CFLAGS=$CFLAGS + CFLAGS=-Wsync-nand + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -Wsync-nand flag" >&5 +$as_echo_n "checking whether $CC accepts -Wsync-nand flag... " >&6; } +if ${ac_cv_flag_HAVE_WSYNCNAND+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +int +main () +{ + + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_flag_HAVE_WSYNCNAND=yes +else + ac_cv_flag_HAVE_WSYNCNAND=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_flag_HAVE_WSYNCNAND" >&5 +$as_echo "$ac_cv_flag_HAVE_WSYNCNAND" >&6; } + CFLAGS=$ac_save_CFLAGS + HAVE_WSYNCNAND=$ac_cv_flag_HAVE_WSYNCNAND + if test "HAVE_WSYNCNAND" = yes; then + : + else + : + fi + + + ################################################################################ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for C optimisation flag" >&5 $as_echo_n "checking for C optimisation flag... " >&6; } diff --git a/configure.in b/configure.in index 15d371bb6..55c13a63b 100644 --- a/configure.in +++ b/configure.in @@ -962,6 +962,8 @@ AC_TRY_CCFLAG([-Wjump-misses-init], [HAVE_WJUMP], [], []) AC_SUBST(HAVE_WJUMP) AC_TRY_CCFLAG([-Wclobbered], [HAVE_WCLOBBERED], [], []) AC_SUBST(HAVE_WCLOBBERED) +AC_TRY_CCFLAG([-Wsync-nand], [HAVE_WSYNCNAND], [], []) +AC_SUBST(HAVE_WSYNCNAND) ################################################################################ dnl -- Override optimisation diff --git a/make.tmpl.in b/make.tmpl.in index 72e261362..11721f157 100644 --- a/make.tmpl.in +++ b/make.tmpl.in @@ -156,7 +156,11 @@ endif ifeq ("@HAVE_WCLOBBERED@", "yes") WFLAGS += -Wclobbered -Wempty-body -Wignored-qualifiers \ -Wmissing-parameter-type -Wold-style-declaration -Woverride-init \ - -Wtype-limits -Wsync-nand -Wlogical-op + -Wtype-limits -Wlogical-op +endif + +ifeq ("@HAVE_WSYNCNAND@", "yes") +WFLAGS += -Wsync-nand endif ifneq ("@STATIC_LINK@", "yes") |