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curl-compilers.m4: detect xlclang

Since it isn't totally clang compatible, we detect this IBM clang
front-end and if detected, avoids some clang specific magic.

Reported-by: Kees Dekker
Fixes #3474
Closes #3476
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bagder committed Jan 15, 2019
1 parent 304bce5 commit 2fa0d57e2e3b7a808af55e52912827813d19c38f
Showing with 11 additions and 2 deletions.
  1. +11 −2 m4/curl-compilers.m4
@@ -5,7 +5,7 @@
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
# Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
@@ -83,7 +83,16 @@ AC_DEFUN([CURL_CHECK_COMPILER_CLANG], [
CURL_CHECK_DEF([__clang__], [], [silent])
if test "$curl_cv_have_def___clang__" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="CLANG"
AC_MSG_CHECKING([if compiler is xlclang])
CURL_CHECK_DEF([__xlc__], [], [silent])
if test "$curl_cv_have_def___xlc__" = "yes" ; then
dnl IBM's almost-compatible clang version
AC_MSG_RESULT([yes])
compiler_id="XLCLANG"
else
AC_MSG_RESULT([no])
compiler_id="CLANG"
fi
fullclangver=`$CC -v 2>&1 | grep version`
clangver=`echo $fullclangver | grep "based on LLVM " | "$SED" 's/.*(based on LLVM \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*)/\1/'`
if test -z "$clangver"; then

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