From 4ce10da36ff4c29dbf2cc40ebfcbcd260b635e05 Mon Sep 17 00:00:00 2001
From: "Erlend E. Aasland" <erlend@python.org>
Date: Fri, 12 Apr 2024 16:33:29 +0200
Subject: gh-96398: Detect emcc and mpicc in compiler names in configure
 (#117819)

- emcc defines __EMSCRIPTEN__
- mpicc doesn't define anything in particular; detect it using basename
---
 configure    | 7 ++++++-
 configure.ac | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 65210e8..027ef83 100755
--- a/configure
+++ b/configure
@@ -6110,7 +6110,9 @@ then :
 else $as_nop
 
 cat > conftest.c <<EOF
-#if defined(__INTEL_COMPILER) || defined(__ICC)
+#if defined(__EMSCRIPTEN__)
+  emcc
+#elif defined(__INTEL_COMPILER) || defined(__ICC)
   icc
 #elif defined(__ibmxl__) || defined(__xlc__) || defined(__xlC__)
   xlc
@@ -6127,6 +6129,9 @@ EOF
 
 if $CPP $CPPFLAGS conftest.c >conftest.out 2>/dev/null; then
   ac_cv_cc_name=`grep -v '^#' conftest.out | grep -v '^ *$' | tr -d ' 	'`
+  if $(expr "//$CC" : '.*/\(.*\)') = "mpicc"; then
+    ac_cv_cc_name="mpicc"
+  fi
 else
   ac_cv_cc_name="unknown"
 fi
diff --git a/configure.ac b/configure.ac
index ece3fe7..35b3a4e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -992,7 +992,9 @@ dnl check for GCC last, other compilers set __GNUC__, too.
 dnl msvc is listed for completeness.
 AC_CACHE_CHECK([for CC compiler name], [ac_cv_cc_name], [
 cat > conftest.c <<EOF
-#if defined(__INTEL_COMPILER) || defined(__ICC)
+#if defined(__EMSCRIPTEN__)
+  emcc
+#elif defined(__INTEL_COMPILER) || defined(__ICC)
   icc
 #elif defined(__ibmxl__) || defined(__xlc__) || defined(__xlC__)
   xlc
@@ -1009,6 +1011,9 @@ EOF
 
 if $CPP $CPPFLAGS conftest.c >conftest.out 2>/dev/null; then
   ac_cv_cc_name=`grep -v '^#' conftest.out | grep -v '^ *$' | tr -d ' 	'`
+  if $(expr "//$CC" : '.*/\(.*\)') = "mpicc"; then
+    ac_cv_cc_name="mpicc"
+  fi
 else
   ac_cv_cc_name="unknown"
 fi
-- 
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