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Subject: Re: [PATCH] Test for profiling support (_mcount/gprof)
To: Andreas Schwab <schwab@suse.de>
Cc: GNU C Library <libc-alpha@sourceware.org>
References: <4d15086e-9e54-014b-1a50-16534f287e24@redhat.com>
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From: Florian Weimer <fweimer@redhat.com>
Message-ID: <907f751a-3916-64c9-f650-df182fb3cdce@redhat.com>
Date: Wed, 16 Aug 2017 08:09:00 -0000
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On 08/16/2017 09:43 AM, Andreas Schwab wrote:
> https://build.opensuse.org/package/live_build_log/home:Andreas_Schwab:glibc/glibc-testsuite/f/i586

One has to download the whole log file to find this:

[ 2374s] gcc: error: -pg and -fomit-frame-pointer are incompatible

This looks like a GCC deficiency.  Anyway, please try the attached patch.

Thanks,
Florian

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tst-gmon: Build with -fno-omit-frame-pointer

If glibc is built with -fomit-frame-pointer to undo the effect of
configuring GCC with --enable-frame-pointer, using -pg by itself results
in a build failure:

gcc: error: -pg and -fomit-frame-pointer are incompatible

2017-08-16  Florian Weimer  <fweimer@redhat.com>

	* gmon/Makefile (CFLAGS-tst-gmon.c): Add -fno-omit-frame-pointer.

diff --git a/gmon/Makefile b/gmon/Makefile
index 39f11acec2..62d96543ff 100644
--- a/gmon/Makefile
+++ b/gmon/Makefile
@@ -38,7 +38,7 @@ endif
 # The mcount code won't work without a frame pointer.
 CFLAGS-mcount.c :=3D -fno-omit-frame-pointer
=20
-CFLAGS-tst-gmon.c :=3D -pg
+CFLAGS-tst-gmon.c :=3D -fno-omit-frame-pointer -pg
 LDFLAGS-tst-gmon :=3D $(no-pie-ldflag)
 CRT-tst-gmon :=3D $(csu-objpfx)gcrt1.o
 tst-gmon-ENV :=3D GMON_OUT_PREFIX=3D$(objpfx)tst-gmon.data

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