[3.12] gh-106962: Detect mpicc in configure.ac (GH-106961) (#107081)

miss-islington · LukasvdWiel · web-flow · commit d87d67b9e65c · 2023-07-23T00:01:44.000Z
Don't let autoconf mistake MPI compilers for Intel compilers; filter out the MPI case to prevent Intel specific options from being applied. (cherry picked from commit 9a6b278) Co-authored-by: Lukas van de Wiel <30800501+LukasvdWiel@users.noreply.github.com>
diff --git a/Misc/NEWS.d/next/Build/2023-07-23-00-38-51.gh-issue-106962.VVYrWB.rst b/Misc/NEWS.d/next/Build/2023-07-23-00-38-51.gh-issue-106962.VVYrWB.rst
@@ -0,0 +1 @@
+Detect MPI compilers in :file:`configure`.
diff --git a/configure b/configure
diff --git a/configure.ac b/configure.ac
@@ -2656,6 +2656,9 @@ yes)
 esac
 
 case "$CC" in
+*mpicc*)
+    CFLAGS_NODIST="$CFLAGS_NODIST"
+    ;;
 *icc*)
     # ICC needs -fp-model strict or floats behave badly
     CFLAGS_NODIST="$CFLAGS_NODIST -fp-model strict"

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Detect MPI compilers in :file:`configure`.