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Fix combreloc test with BSD grep 

The test for "-z combreloc" fails when cross-compiling on a machine
that uses BSD grep (e.g. on macos). grep complains about empty
subexpression and exits with non-zero status, which is interpreted
by configure as "not found". As a result, support for "-z combreloc"
(HAVE_Z_COMBRELOC) is not detected, leading to link failure on SPARC.

While there, replace fgrep with 'grep -F', as fgrep is non-POSIX.

	* configure.ac: Avoid empty subexpression in grep.

Signed-off-by: Alexey Neyman <stilor@att.net>
This commit is contained in:
Alexey Neyman 2017-03-12 13:16:18 -07:00 committed by Mike Frysinger
parent b36a65e5ca
commit e37fc4aa68
3 changed files with 14 additions and 9 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
2017-03-15 Alexey Neyman <stilor@att.net>
* configure.ac: Avoid empty subexpression in grep.
* configure: Regenerate.
2017-03-13 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* posix/test-errno.c (do_test): Initialize setsockopt optlen.

8
configure vendored
View File

@ -5804,7 +5804,7 @@ if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }
then
if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
if $READELF -S conftest.so | grep -E '.rela?.dyn' > /dev/null; then
libc_cv_z_combreloc=yes
else
libc_cv_z_combreloc=no
@ -6120,7 +6120,7 @@ void zero (void *x)
__builtin_memset (x, 0, 1000);
}
EOF
if { ac_try='${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null'
if { ac_try='${CC-cc} -O3 -S conftest.c -o - | grep -F "memset" > /dev/null'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6152,7 +6152,7 @@ char *foo (const char *a, const char *b)
return __builtin_strstr (a, b);
}
EOF
if { ac_try='${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null'
if { ac_try='${CC-cc} -O3 -S conftest.c -o - | grep -F "my_strstr" > /dev/null'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
@ -6511,7 +6511,7 @@ long ehdr (void) { return __ehdr_start.val; }
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
if $READELF -r conftest | fgrep __ehdr_start >/dev/null; then
if $READELF -r conftest | grep -F __ehdr_start >/dev/null; then
libc_cv_ehdr_start=broken
else
libc_cv_ehdr_start=yes

10
configure.ac
View File

@ -1390,8 +1390,8 @@ dnl The following test is a bit weak. We must use a tool which can test
dnl cross-platform since the gcc used can be a cross compiler. Without
dnl introducing new options this is not easily doable. Instead use a tool
dnl which always is cross-platform: readelf. To detect whether -z combreloc
dnl look for a section named .rel.dyn.
if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
dnl look for a section named .rel.dyn or .rela.dyn.
if $READELF -S conftest.so | grep -E '.rela?.dyn' > /dev/null; then
libc_cv_z_combreloc=yes
else
libc_cv_z_combreloc=no
@ -1586,7 +1586,7 @@ void zero (void *x)
}
EOF
dnl
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | grep -F "memset" > /dev/null]);
then
libc_cv_gcc_builtin_memset=no
else
@ -1606,7 +1606,7 @@ char *foo (const char *a, const char *b)
}
EOF
dnl
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | grep -F "my_strstr" > /dev/null]);
then
libc_cv_gcc_builtin_redirection=yes
else
@ -1747,7 +1747,7 @@ typedef struct {
extern const Ehdr __ehdr_start __attribute__ ((visibility ("hidden")));
long ehdr (void) { return __ehdr_start.val; }
])],
[if $READELF -r conftest | fgrep __ehdr_start >/dev/null; then
[if $READELF -r conftest | grep -F __ehdr_start >/dev/null; then
libc_cv_ehdr_start=broken
else
libc_cv_ehdr_start=yes