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