dev-lang/nim: use $CC instead of 'gcc', bug #722958

Reported-by: Agostino Sarubbo
Closes: https://bugs.gentoo.org/722958
Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

dev-lang/nim/nim-1.2.0.ebuild

@@ -38,10 +38,17 @@ nim_use_enable() {
 	use $1 && echo "-d:$2"
 }
 
-src_compile() {
+src_configure() {
 	export XDG_CACHE_HOME=${T}/cache #667182
 	tc-export CC LD
 
+	# Override default CC=gcc.
+	echo "gcc.exe            = \"$(tc-getCC)\"" >> config/nim.cfg || die
+	echo "gcc.linkerexe      = \"$(tc-getCC)\"" >> config/nim.cfg || die
+}
+
+src_compile() {
+
 	_run ./build.sh
 
 	_run ./bin/nim --parallelBuild:$(makeopts_jobs) c koch