--- ChangeLog | 4 ++++ configure.ac | 27 ++++++++++++--------------- 2 files changed, 16 insertions(+), 15 deletions(-) diff --git a/ChangeLog b/ChangeLog index ab7be69..262744c 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,9 @@ 2014-06-27 Roland Levillain <roland@lrde.epita.fr> + * configure.ac: Aesthetic changes. + +2014-06-27 Roland Levillain <roland@lrde.epita.fr> + Use AX_CHECK_COMPILE_FLAG to check compiler support for `-pipe'. * configure.ac: Here. diff --git a/configure.ac b/configure.ac index be32513..e5b8417 100644 --- a/configure.ac +++ b/configure.ac @@ -78,21 +78,18 @@ test $CXX --version 2>/dev/null | grep '\bICC\b' >/dev/null 2>&1 && ICPC=yes # Try to use pipes between compiler stages to speed the compilation up. AX_CHECK_COMPILE_FLAG([-pipe], [CXXFLAGS="$CXXFLAGS -pipe"]) -# GNU C++ compiler setup. -if test "$GXX" = yes; then - - # The code generated for mln::data::impl::memcpy__() by g++ 4.2 with - # a high optimization level (`-O3') and without - # `-fno-strict-aliasing' might be wrong, at least with Debian's g++ - # 4.2 on IA-32 (see also milena/mln/memcpy_.hh). We observed this - # behavior with e.g. milena/apps/graph-morpho/samples-image2d.cc. - # Note that Debian's g++ 4.0, 4.1, 4.3 and 4.4 are fine. - # - # So, when the C++ compiler is g++ 4.2, set STRICT_ALIASING_CXXFLAGS - # to `-fno-strict-aliasing'. - if $CXX --version | head -n 1 | grep '\b4\.2' >/dev/null 2>&1; then - STRICT_ALIASING_CXXFLAGS=-fno-strict-aliasing - fi +# The code generated for mln::data::impl::memcpy__() by g++ 4.2 with a +# high optimization level (`-O3') and without `-fno-strict-aliasing' +# might be wrong, at least with Debian's g++ 4.2 on IA-32 (see also +# milena/mln/data/memcpy_.hh). We observed this behavior with +# e.g. milena/apps/graph-morpho/samples-image2d.cc. Note that +# Debian's g++ 4.0, 4.1, 4.3 and 4.4 are fine. +# +# So, when the C++ compiler is g++ 4.2, set STRICT_ALIASING_CXXFLAGS +# to `-fno-strict-aliasing'. +if test "$GXX" = yes \ + && $CXX --version | head -n 1 | grep '\b4\.2' >/dev/null 2>&1; then + STRICT_ALIASING_CXXFLAGS=-fno-strict-aliasing fi AC_SUBST([STRICT_ALIASING_CXXFLAGS]) -- 1.7.10.4