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bpo-33473: Be slightly better about CFLAGS, LDFLAGS, and related #6771

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bpo-33473: Be slightly better about CFLAGS, LDFLAGS, and related #6771

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bpo-33473: Be slightly better about CFLAGS, LDFLAGS, and related
grimreaper May 12, 2018
898f34d
per @benjaminp
grimreaper May 13, 2018
d6ae20c
regen
grimreaper May 15, 2018
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Build/2018-05-12-15-58-15.bpo-33473.BEm_Wt.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
configure.ac was fixed to correctly report CC, CFLAGS, and LDFLAGS
27 changes: 13 additions & 14 deletions configure
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Expand Up @@ -7529,11 +7529,9 @@ if ${ac_cv_pthread+:} false; then :
$as_echo_n "(cached) " >&6
else
ac_save_cc="$CC"
CC="$CC -pthread"
if test "$cross_compiling" = yes; then :
ac_cv_pthread=no
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
CC="$CC"
CFLAGS="-pthread"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */

#include <stdio.h>
Expand All @@ -7550,15 +7548,13 @@ int main(){
}

_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
if ac_fn_c_try_link "$LINENO"; then :
ac_cv_pthread=yes
else
ac_cv_pthread=no
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
conftest.$ac_objext conftest.beam conftest.$ac_ext
fi

rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
CC="$ac_save_cc"
fi

Expand All @@ -7585,7 +7581,8 @@ then
ac_cv_cxx_thread=yes
elif test "$ac_cv_pthread" = "yes"
then
CXX="$CXX -pthread"
CXX="$CXX"
CXXFLAGS="-pthread"
ac_cv_cxx_thread=yes
fi

Expand Down Expand Up @@ -8865,7 +8862,7 @@ then CC="$CC -Kpthread"
elif test "$ac_cv_kthread" = "yes"
then CC="$CC -Kthread"
elif test "$ac_cv_pthread" = "yes"
then CC="$CC -pthread"
then CC="$CC"; BASECFLAGS="$BASECFLAGS -pthread"; BASECXXFLAGS="$BASECXXFLAGS -pthread"
fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_t" >&5
Expand Down Expand Up @@ -10298,9 +10295,11 @@ then
posix_threads=yes
elif test "$ac_cv_pthread" = "yes"
then
CC="$CC -pthread"
CC="$CC"
BASECFLAGS="$BASECFLAGS -pthread"
if test "$ac_cv_cxx_thread" = "yes"; then
CXX="$CXX -pthread"
CXX="$CXX"
BASECXXFLAGS="$BASECFLAGS -pthread"
fi
posix_threads=yes
else
Expand Down
16 changes: 10 additions & 6 deletions configure.ac
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Expand Up @@ -1993,8 +1993,9 @@ then
AC_MSG_CHECKING(whether $CC accepts -pthread)
AC_CACHE_VAL(ac_cv_pthread,
[ac_save_cc="$CC"
CC="$CC -pthread"
AC_RUN_IFELSE([AC_LANG_SOURCE([[
CC="$CC"
CFLAGS="-pthread"
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if you're going to change it, you need to save and restore CFLAGS as is done for CC

AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <pthread.h>

Expand Down Expand Up @@ -2030,7 +2031,8 @@ then
ac_cv_cxx_thread=yes
elif test "$ac_cv_pthread" = "yes"
then
CXX="$CXX -pthread"
CXX="$CXX"
CXXFLAGS="-pthread"
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this also stamps over whatever CXXFLAGS was before

Also, it seems the cases above need this treatment?

ac_cv_cxx_thread=yes
fi

Expand Down Expand Up @@ -2261,7 +2263,7 @@ then CC="$CC -Kpthread"
elif test "$ac_cv_kthread" = "yes"
then CC="$CC -Kthread"
elif test "$ac_cv_pthread" = "yes"
then CC="$CC -pthread"
then CC="$CC"; BASECFLAGS="$BASECFLAGS -pthread"; BASECXXFLAGS="$BASECXXFLAGS -pthread"
fi

AC_MSG_CHECKING(for pthread_t)
Expand Down Expand Up @@ -2973,9 +2975,11 @@ then
posix_threads=yes
elif test "$ac_cv_pthread" = "yes"
then
CC="$CC -pthread"
CC="$CC"
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this line seems rather otiose now

BASECFLAGS="$BASECFLAGS -pthread"
if test "$ac_cv_cxx_thread" = "yes"; then
CXX="$CXX -pthread"
CXX="$CXX"
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ditto

BASECXXFLAGS="$BASECFLAGS -pthread"
fi
posix_threads=yes
else
Expand Down