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string: Suppress Clang warnings on tester.c 

Add a configure check for -Wno-fortify-source to suppress Clang warnings
on string/tester.c, like:

tester.c:385:10: error: 'strncat' size argument is too large; destination buffer has size 50, but size argument is 99 [-Werror,-Wfortify-source]
  385 |   check (strncat (one, "lmn", 99) == one, 1);   /* Returned value. */

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
This commit is contained in:
H.J. Lu 2024-12-23 05:12:02 +08:00
parent cb74bafbb5
commit 31c47126f4
3 changed files with 49 additions and 2 deletions
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34
configure vendored
View File

@ -8001,6 +8001,40 @@ test-config-cflags-wno-restrict = $libc_cv_test_cflags_wno_restrict"
saved_CC="$CC"
CC="$TEST_CC"
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking -Wno-fortify-source in testing" >&5
printf %s "checking -Wno-fortify-source in testing... " >&6; }
if test ${libc_cv_test_cflags_wno_fortify_source+y}
then :
printf %s "(cached) " >&6
else case e in #(
e) if { ac_try='${CC-cc} -c -Werror -Wno-fortify-source -xc /dev/null -S -o /dev/null'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }
then :
libc_cv_test_cflags_wno_fortify_source=-Wno-fortify-source
else case e in #(
e) libc_cv_test_cflags_wno_fortify_source=
;;
esac
fi ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_test_cflags_wno_fortify_source" >&5
printf "%s\n" "$libc_cv_test_cflags_wno_fortify_source" >&6; }
CC="$saved_CC"
config_vars="$config_vars
test-config-cflags-wno-fortify-source = $libc_cv_test_cflags_wno_fortify_source"
saved_CC="$CC"
CC="$TEST_CC"
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking -finput-charset=ascii in testing" >&5

10
configure.ac
View File

@ -1589,6 +1589,16 @@ LIBC_TRY_TEST_CC_OPTION([-Wno-restrict],
LIBC_CONFIG_VAR([test-config-cflags-wno-restrict],
[$libc_cv_test_cflags_wno_restrict])
dnl Check if TEST_CC supports -Wno-fortify-source.
LIBC_TRY_TEST_CC_OPTION([-Wno-fortify-source],
[-c -Werror -Wno-fortify-source],
libc_cv_test_cflags_wno_fortify_source,
[libc_cv_test_cflags_wno_fortify_source=-Wno-fortify-source],
[libc_cv_test_cflags_wno_fortify_source=]
)
LIBC_CONFIG_VAR([test-config-cflags-wno-fortify-source],
[$libc_cv_test_cflags_wno_fortify_source])
dnl Check if TEST_CC supports -finput-charset=ascii.
LIBC_TRY_TEST_CC_OPTION([-finput-charset=ascii],
[-c -Werror -finput-charset=ascii],

7
string/Makefile
View File

@ -252,8 +252,11 @@ endif
include ../Rules
CFLAGS-inl-tester.c += -fno-builtin
CFLAGS-noinl-tester.c += -fno-builtin
CFLAGS-tester.c += $(test-config-cflags-wno-fortify-source)
CFLAGS-inl-tester.c += -fno-builtin \
$(test-config-cflags-wno-fortify-source)
CFLAGS-noinl-tester.c += -fno-builtin \
$(test-config-cflags-wno-fortify-source)
CFLAGS-tst-strlen.c += -fno-builtin
CFLAGS-stratcliff.c += -fno-builtin
CFLAGS-test-ffs.c += -fno-builtin