On Jan 23, 2020, Jonathan Wakely <jwak...@redhat.com> wrote:
> On 23/01/20 00:20 -0300, Alexandre Oliva wrote:
>> On Jan 22, 2020, Jonathan Wakely <jwak...@redhat.com> wrote:
>>
>>> Isn't allowing arithmetic on function pointers a GNU extension?
>>
>> Does that matter? This test is only supposed to be compiled by GCC.
> Maybe if somebody was crazy enough to build GCC with -pedantic-errors?
In TFLAGS while configuring libstdc++... Yeah, that would fail.
>>> I think just adding the #undef to what you had originally is the best
>>> version.
>>
>> 'k, thanks, will adjust, test, post and install.
> Thanks.
Here's the revised version I'm about to install... Regstrapped on
x86_64-linux-gnu along with other patches, also retested on an affected
target.
reject macros in math decl check
From: Alexandre Oliva <ol...@adacore.com>
The C++ headers #undef the functions we are testing for, just in case
they're implemented as macros, so do that in the cross math decl tests
as well.
for libstdc++-v3/ChangeLog
* crossconfig.m4 (GLIBCXX_CHECK_MATH_DECL): Reject macros.
* configure: Rebuild.
---
libstdc++-v3/configure | 22 ++++++++++++++++++++++
libstdc++-v3/crossconfig.m4 | 1 +
2 files changed, 23 insertions(+)
diff --git a/libstdc++-v3/crossconfig.m4 b/libstdc++-v3/crossconfig.m4
index 2a0cb04..fe18288 100644
--- a/libstdc++-v3/crossconfig.m4
+++ b/libstdc++-v3/crossconfig.m4
@@ -333,6 +333,7 @@ AC_DEFUN([GLIBCXX_CHECK_MATH_DECL], [
#ifdef HAVE_IEEEFP_H
# include <ieeefp.h>
#endif
+#undef $1
], [
void (*f)(void) = (void (*)(void))$1;
], [glibcxx_cv_func_$1_use=yes
--
Alexandre Oliva, freedom fighter he/him https://FSFLA.org/blogs/lxo
Free Software Evangelist Stallman was right, but he's left :(
GNU Toolchain Engineer FSMatrix: It was he who freed the first of us
FSF & FSFLA board member The Savior shall return (true);
