From 9bad9efbe713d72ca7ba01b19dcd5c34031ff6b1 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 15 Apr 2020 14:17:20 -0700
Subject: [PATCH] Check for clang before checking gcc version

Clang advertises itself to be gcc 4.2.1, so when compiling this test
here fails since gcc < 4.4.5 did not support -static-libstdc++ but thats
not true for clang, so its better to make an additional check for clang
before resorting to gcc version check. This should let clang enable
static libstdc++ linking

Upstream-Status: Pending

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 configure    | 2 +-
 configure.ac | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index bbfb5979546..fef4bd65124 100755
--- a/configure
+++ b/configure
@@ -5446,7 +5446,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
-#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
+#if !defined(__clang__) && ((__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5))
 #error -static-libstdc++ not implemented
 #endif
 int main() {}
diff --git a/configure.ac b/configure.ac
index f9694cdf901..54a3a968307 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1419,7 +1419,7 @@ if test "$GCC" = yes; then
   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
   AC_LANG_PUSH(C++)
   AC_LINK_IFELSE([AC_LANG_SOURCE([
-#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
+#if !defined(__clang__) && ((__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5))
 #error -static-libstdc++ not implemented
 #endif
 int main() {}])],
