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view modules/configmake @ 37246:5cfb3a67238d
regex: avoid glibc deadlock during configure
glibc has a known bug where certain corruptions of the heap can
cause malloc to default to printing a debug message that includes
a backtrace, but the act of getting the backtrace uses dlopen
which in turn calls into malloc, causing a recursive lock ending
in deadlock. Thus, when configure is probing for a known glibc
heap corruption bug, the overall configure would hang.
The solution suggested by glibc developers is to force malloc
to quit printing debug messages, which avoids recursive malloc.
* m4/regex.m4 (gl_REGEX): Avoid recursive malloc deadlock when
glibc bug 15078 in turn triggers bug 16159.
Reported by Michal Privoznik.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Tue, 03 Dec 2013 10:34:13 -0700 |
parents | b296df26556b |
children |
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Description: Access from source code to variables set by "configure" or "make". Files: m4/configmake.m4 Depends-on: configure.ac: gl_CONFIGMAKE_PREP Makefile.am: # Listed in the same order as the GNU makefile conventions, and # provided by autoconf 2.59c+ or 2.70. # The Automake-defined pkg* macros are appended, in the order # listed in the Automake 1.10a+ documentation. configmake.h: Makefile $(AM_V_GEN)rm -f $@-t && \ { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \ echo '#define PREFIX "$(prefix)"'; \ echo '#define EXEC_PREFIX "$(exec_prefix)"'; \ echo '#define BINDIR "$(bindir)"'; \ echo '#define SBINDIR "$(sbindir)"'; \ echo '#define LIBEXECDIR "$(libexecdir)"'; \ echo '#define DATAROOTDIR "$(datarootdir)"'; \ echo '#define DATADIR "$(datadir)"'; \ echo '#define SYSCONFDIR "$(sysconfdir)"'; \ echo '#define SHAREDSTATEDIR "$(sharedstatedir)"'; \ echo '#define LOCALSTATEDIR "$(localstatedir)"'; \ echo '#define RUNSTATEDIR "$(runstatedir)"'; \ echo '#define INCLUDEDIR "$(includedir)"'; \ echo '#define OLDINCLUDEDIR "$(oldincludedir)"'; \ echo '#define DOCDIR "$(docdir)"'; \ echo '#define INFODIR "$(infodir)"'; \ echo '#define HTMLDIR "$(htmldir)"'; \ echo '#define DVIDIR "$(dvidir)"'; \ echo '#define PDFDIR "$(pdfdir)"'; \ echo '#define PSDIR "$(psdir)"'; \ echo '#define LIBDIR "$(libdir)"'; \ echo '#define LISPDIR "$(lispdir)"'; \ echo '#define LOCALEDIR "$(localedir)"'; \ echo '#define MANDIR "$(mandir)"'; \ echo '#define MANEXT "$(manext)"'; \ echo '#define PKGDATADIR "$(pkgdatadir)"'; \ echo '#define PKGINCLUDEDIR "$(pkgincludedir)"'; \ echo '#define PKGLIBDIR "$(pkglibdir)"'; \ echo '#define PKGLIBEXECDIR "$(pkglibexecdir)"'; \ } | sed '/""/d' > $@-t && \ mv -f $@-t $@ BUILT_SOURCES += configmake.h CLEANFILES += configmake.h configmake.h-t Include: /* Include only after all system include files. */ "configmake.h" License: LGPLv2+ Maintainer: all