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ruby--ruby/tool/m4/ruby_cppoutfile.m4
shyouhei 5839396028 Emacs friendliness [ci skip]
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61983 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-01-20 07:14:59 +00:00

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# -*- Autoconf -*-
AC_DEFUN([RUBY_CPPOUTFILE],
[AC_CACHE_CHECK(whether ${CPP} accepts -o, rb_cv_cppoutfile,
[save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS='-o conftest-1.i'
rb_cv_cppoutfile=no
AC_TRY_CPP([test-for-cppout],
[grep test-for-cppout conftest-1.i > /dev/null && rb_cv_cppoutfile=yes])
CPPFLAGS="$save_CPPFLAGS"
rm -f conftest*])
AS_IF([test "$rb_cv_cppoutfile" = yes], [
CPPOUTFILE='-o conftest.i'
], [test "$rb_cv_cppoutfile" = no], [
CPPOUTFILE='> conftest.i'
], [test -n "$rb_cv_cppoutfile"], [
CPPOUTFILE="$rb_cv_cppoutfile"
])
AC_SUBST(CPPOUTFILE)])dnl