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| author | 卜部昌平 <shyouhei@ruby-lang.org> | 2020-09-03 15:06:56 +0900 |
|---|---|---|
| committer | 卜部昌平 <shyouhei@ruby-lang.org> | 2020-09-03 15:14:09 +0900 |
| commit | 50b18e81295ad2d45975e4d8ea1e0c7e85140b97 (patch) | |
| tree | f9805193185d023636465b38b8ff81c92622091b | |
| parent | 3fb255625bba37cd948751163f620a4b2926c394 (diff) | |
configure: detect that there is no g++
AC_PROG_CXX checks for several C++ compilers INCLUDING g++. When none
of them were found it sets the CXX variable to be g++. This doesn't
make any sense. Absense of g++ has already been made sure.
Because we don't want insanity (that's the whole reason we test the
environment using autoconf), we need to swipe such insane variable out.
| -rw-r--r-- | configure.ac | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index e4a7542663..cbfce070e9 100644 --- a/configure.ac +++ b/configure.ac @@ -197,6 +197,14 @@ AC_CHECK_TOOLS([STRIP], [gstrip strip], [:]) AS_IF([test ! $rb_test_CFLAGS], [AS_UNSET(CFLAGS)]); AS_UNSET(rb_test_CFLAGS) AS_IF([test ! $rb_test_CXXFLAGS], [AS_UNSET(CXXFLAGS)]); AS_UNSET(rb_save_CXXFLAGS) +AS_IF([test "${CXX}" = "g++" -a -z "${GXX}"], [ + # AC_PROG_CXX sets $CXX to "g++" when it purposefully finds that there is + # _no_ g++. This brain-damaged design must be worked around. Thankfully, + # similar thing doesn't happen for AC_PROG_CC. + AC_MSG_NOTICE([C++ features disabled due to lack of a C++ compiler.]) + AS_UNSET(CXX) +]) + test x"$target_alias" = x && target_os=`echo $target_os | sed 's/linux-gnu$/linux/;s/linux-gnu/linux-/'` ac_install_sh='' # unusable for extension libraries. |