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[Bug libc/6428] New: --noexecstack is not used with CFLAGS="-g1"
- From: "mrs at mythic-beasts dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 17 Apr 2008 20:02:35 -0000
- Subject: [Bug libc/6428] New: --noexecstack is not used with CFLAGS="-g1"
- Reply-to: sourceware-bugzilla at sourceware dot org
Configuring glibc with CFLAGS="-g1" causes glibc to be built without the
--noexecstack option:
$ ../libc/configure | grep noexecstack
checking whether --noexecstack is desirable for .S files... yes
$ ../libc/configure CFLAGS="-g1" | grep noexecstack
checking whether --noexecstack is desirable for .S files... no
Other variants of the -g option (-g, -g0, -g2) give the correct behaviour.
This happens because the configure script is doing an invocation of gcc like the
following:
$ gcc -g1 -S conftest.c
$ gcc -g1 -c conftest.s -Wa,--noexecstack
test.s: Assembler messages:
test.s:79: Error: file number 1 already allocated
This fails for a reason other than the -Wa,--noexecstack argument, but it causes
configure to conclude that --noexecstack is not available. I filed a bug on gcc
(http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35925) because it was not clear
whether passing -g1 to both invocations should be expected to work.
One way to fix this is not to pass CFLAGS to the second invocation; using
ASFLAGS brings this into line with other compilations of .s files. Suggested
patches attached.
--
Summary: --noexecstack is not used with CFLAGS="-g1"
Product: glibc
Version: 2.4
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: mrs at mythic-beasts dot com
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=6428
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