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configure.ac: avoid squashing CXX=g++

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We are discussing this issue at [Bug #17337] but in the meantime, leave
this questionable autoconf glitch as-is to save sassc and eventmachine.
This commit is contained in:
卜部昌平 2020-12-15 16:57:28 +09:00
parent 8558d5e480
commit ccc828f499
Notes: git 2020-12-16 08:48:13 +09:00
1 changed files with 5 additions and 3 deletions
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8
configure.ac
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@ -194,8 +194,7 @@ AS_IF([test "${CXX}" = "g++" -a -z "${GXX}"], [
# AC_PROG_CXX sets $CXX to "g++" when it purposefully finds that there is
# _no_ g++. This brain-damaged design must be worked around. Thankfully,
# similar thing doesn't happen for AC_PROG_CC.
AC_MSG_NOTICE([C++ features disabled due to lack of a C++ compiler.])
AS_UNSET(CXX)
rb_there_is_in_fact_no_gplusplus_but_autoconf_is_cheating_us=true
])
test x"$target_alias" = x &&
@ -1134,7 +1133,10 @@ main()
[ LIBS="-lm $LIBS"])
: ${ORIG_LIBS=$LIBS}
AS_IF([test -n "${CXX}"], [
AS_IF([test -n "${rb_there_is_in_fact_no_gplusplus_but_autoconf_is_cheating_us}"], [
AC_MSG_NOTICE([Test skipped due to lack of a C++ compiler.])
],
[test -n "${CXX}"], [
RUBY_WERROR_FLAG([
AC_MSG_CHECKING([whether CXXFLAGS is valid])
AC_LANG_PUSH(C++)