diff options
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 38 |
1 files changed, 27 insertions, 11 deletions
@@ -1686,23 +1686,33 @@ LD=$CXX # echocheck "compiler version" -# We first check whether we have an Intel compiler here, since the Intel compiler -# can also fake itself as an gcc (to ease compatibility with common Linux etc. -# programs). +# Some compilers pretend to be gcc to ease compatibility with +# common Linux etc. programs. We first check for some of these here. +have_gcc=no +cc_check_define __GNUC__ && have_gcc=yes have_icc=no cc_check_define __INTEL_COMPILER && have_icc=yes +have_clang=no +cc_check_define __clang__ && have_clang=yes if test "$have_icc" = yes; then add_line_to_config_mk 'HAVE_ICC = 1' - # Make ICC error our on unknown command line options instead of printing + # Make ICC error out on unknown command line options instead of printing # a warning. This is for example required to make the -Wglobal-destructors # detection work correctly. append_var CXXFLAGS "-diag-error 10006,10148" + + # ICC doesn't accept all gcc options, so we disable have_gcc, even if + # ICC does have the gcc-compatibility defines. + have_gcc=no fi -have_gcc=no -cc_check_define __GNUC__ && have_gcc=yes +if test "$have_clang" = yes; then + add_line_to_config_mk 'HAVE_CLANG = 1' + + # clang does accept all gcc options we use, so we keep have_gcc +fi if test "$have_gcc" = yes; then add_line_to_config_mk 'HAVE_GCC = 1' @@ -1710,11 +1720,17 @@ if test "$have_gcc" = yes; then _cxx_minor=`gcc_get_define __GNUC_MINOR__` cxx_version="`( $CXX -dumpversion ) 2>&1`" - if test -n "`gcc_get_define __clang__`"; then - add_line_to_config_mk 'HAVE_CLANG = 1' - fi - - if test "$_cxx_major" -eq 2 && test "$_cxx_minor" -ge 95 || \ + if test "$have_clang" = yes; then + # Clang sets a gcc version number for compatibility. + # We keep that as _cxx_minor/_cxx_major for later + # compiler version checks. + + # For the version reported in the configure log (cxx_version), + # we get the actual clang version. + cxx_version=`gcc_get_define __clang_version__` + cxx_version="`echo "${cxx_version}" | sed -e 's/"\([^ ]\+\) .*/\1/'`" + cxx_version="clang $cxx_version, ok" + elif test "$_cxx_major" -eq 2 && test "$_cxx_minor" -ge 95 || \ test "$_cxx_major" -gt 2 ; then cxx_version="$cxx_version, ok" cxx_verc_fail=no |