diff options
| -rw-r--r-- | INSTALL | 20 | ||||
| -rw-r--r-- | NEWS | 1 | ||||
| -rw-r--r-- | configure.ac | 4 |
3 files changed, 15 insertions, 10 deletions
@@ -238,13 +238,19 @@ specific architecture. [1] http://permalink.gmane.org/gmane.comp.gnu.libtool.patches/10111 -Note: By default, the configure script tries to set CC/CFLAGS to GMP's -ones (this feature needs GMP 4.3.0 or later, or the --with-gmp-build -option). However this is not guaranteed to work as the configure script -does some compiler tests earlier, and the change may be too late. Also, -the values obtained from GMP may be incorrect if GMP has been built -on a different machine. In such a case, the user may need to specify -CC/CFLAGS as explained below. +Note: By default, the configure script tries to set CC / CFLAGS to GMP's +ones from gmp.h (__GMP_CC / __GMP_CFLAGS) in order to ensure that MPFR is +built with the same ABI as GMP. The reason is that when GMP is built, it +may set CC / CFLAGS to select an ABI that is not the default one in order +to have a better performance. The -pedantic option in GMP's CFLAGS, when +present (which is the case by default), is removed, because the MPFR +build system uses some C extensions (when this script detects that they +are supported) and -pedantic yields too many useless warnings. However, +this setting from GMP is not guaranteed to work as the configure script +does some compiler tests earlier, and a conflict may arise. Also, the +values obtained from GMP may be incorrect for the MPFR build if GMP has +been built on a different machine; in such a case, the user may need to +specify CC / CFLAGS, as explained below. Moreover, even without --with-gmp-build and --enable-gmp-internals, MPFR might use some GMP internals by mistake. This would be a bug, @@ -31,6 +31,7 @@ Changes from version 4.0.1 to version 4.0.2: Changes from version 4.0.0 to version 4.0.1: - Improved MPFR manual. - Improved __GMP_CC and __GMP_CFLAGS retrieval (in particular for MS Windows). +- Option -pedantic is now always removed from __GMP_CFLAGS (see INSTALL). - Fixed a build failure on some platforms when --with-gmp-build is used. - Bug fixes (see ChangeLog file), in particular in mpfr_div_ui, which could yield an incorrectly rounded result to nearest when using diff --git a/configure.ac b/configure.ac index c535513bf..f4f682157 100644 --- a/configure.ac +++ b/configure.ac @@ -270,11 +270,9 @@ if test -z "$GMP_CC$GMP_CFLAGS" ; then # Get CFLAGS echo "#include \"gmp.h\"" > conftest.c echo "MPFR_OPTION __GMP_CFLAGS" >> conftest.c - unset rmpedantic - [test "$enable_logging" = yes && rmpedantic='s/[ "]-pedantic[ "]/ /g;'] $cpp $CPPFLAGS conftest.c 2> /dev/null > conftest.txt test $? -ne 0 && continue - GMP_CFLAGS=`$EGREP MPFR_OPTION conftest.txt | $SED -e "$rmpedantic"'s/MPFR_OPTION //g;s/ *" *//g'` + [GMP_CFLAGS=`$EGREP MPFR_OPTION conftest.txt | $SED -e 's/[ "]-pedantic[ "]/ /g;s/MPFR_OPTION //g;s/ *" *//g'`] break done rm -f conftest* |