diff options
| author | Teresa Johnson <tejohnson@google.com> | 2012-09-13 04:59:14 +0000 |
|---|---|---|
| committer | Teresa Johnson <tejohnson@google.com> | 2012-09-13 04:59:14 +0000 |
| commit | 41a44ce677319153b0a18c4530e87cca92a02450 (patch) | |
| tree | 82ac9f479b6edc66be72e9fef90299de5bc73430 /gcc/configure | |
| parent | 3f66ea3dacec0bd72c8ae015910eb29fec3f9584 (diff) | |
This fixes PR gcov-profile/54487 where the gcda files were not locked
by the profile-use read, enabling writes by other instrumented compiles
to change the profile in the middle of the profile use read. The GCOV_LOCKED
macro was not set because it was guarded by HOST_HAS_F_SETLKW, which was
never set. The fix is to add a compile test in the configure to set it.
2012-09-12 Teresa Johnson <tejohnson@google.com>
PR gcov-profile/54487
* configure.ac (HOST_HAS_F_SETLKW): Set based on compile
test using F_SETLKW with fcntl.
* configure, config.in: Regenerate.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@191238 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/configure')
| -rwxr-xr-x | gcc/configure | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/gcc/configure b/gcc/configure index 5bb409a3b4d..86fa82543e0 100755 --- a/gcc/configure +++ b/gcc/configure @@ -10731,6 +10731,46 @@ $as_echo "#define HAVE_CLOCK_T 1" >>confdefs.h fi +# Check if F_SETLKW is supported by fcntl. +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for F_SETLKW" >&5 +$as_echo_n "checking for F_SETLKW... " >&6; } +if test "${ac_cv_f_setlkw+set}" = set; then : + $as_echo_n "(cached) " >&6 +else + +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ + +#include <fcntl.h> +int +main () +{ + +struct flock fl; +fl.l_whence = 0; +fl.l_start = 0; +fl.l_len = 0; +fl.l_pid = 0; +return fcntl (1, F_SETLKW, &fl); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_compile "$LINENO"; then : + ac_cv_f_setlkw=yes +else + ac_cv_f_setlkw=no +fi +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_f_setlkw" >&5 +$as_echo "$ac_cv_f_setlkw" >&6; } +if test $ac_cv_f_setlkw = yes; then + +$as_echo "#define HOST_HAS_F_SETLKW 1" >>confdefs.h + +fi + # Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests. CFLAGS="$saved_CFLAGS" CXXFLAGS="$saved_CXXFLAGS" @@ -17742,7 +17782,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 17745 "configure" +#line 17785 "configure" #include "confdefs.h" #if HAVE_DLFCN_H @@ -17848,7 +17888,7 @@ else lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2 lt_status=$lt_dlunknown cat > conftest.$ac_ext <<_LT_EOF -#line 17851 "configure" +#line 17891 "configure" #include "confdefs.h" #if HAVE_DLFCN_H |