From 912a8dcfc5369d840dcd6bf0f88ee0bac7d902d6 Mon Sep 17 00:00:00 2001
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From: Nobuyoshi Nakada <nobu@ruby-lang.org>
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Date: Thu, 30 Sep 2021 18:24:37 +0900
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Subject: [PATCH] Needs `AC_PROG_CC`
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Although `AC_PROG_CC_C99` has been obsolete, `AC_PROG_CC` is not
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and the latter is necessary not to make C++ compiler mandatory.
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[Retrieved from:
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https://github.com/ruby/ruby/commit/912a8dcfc5369d840dcd6bf0f88ee0bac7d902d6]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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configure.ac | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/configure.ac b/configure.ac
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index b24a8f59b0d2..c7059ee1ecf4 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -218,7 +218,7 @@ rb_test_CXXFLAGS=${CXXFLAGS+yes}
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# BSD's ports and MacPorts prefix GNU binutils with 'g'
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dnl Seems necessarily in order to add -std=gnu99 option for gcc 4.9.
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-m4_version_prereq([2.70], [], [AC_PROG_CC_C99])
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+m4_version_prereq([2.70], [AC_PROG_CC], [AC_PROG_CC_C99])
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AC_PROG_CXX
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AC_PROG_CPP
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