Try minimal no module

configure

@@ -47,6 +47,34 @@ EOF
 }
 
 
+set_gerbil_gcc () {
+	echo "\n;; Added auto via ./configure\n(set! %default-gerbil-gcc \"$1\")" >> \
+	     ./src/gerbil/compiler/driver.ss
+}
+
+find_gerbil_gcc () {
+    local cc=''
+
+    [[ -n "${CC}" ]] && cc="$CC";
+    [[ -n "${GERBIL_GCC}" ]] && cc="$GERBIL_GCC";
+
+    if [[ -n "${cc}" ]];
+    then
+	set_gerbil_gcc "${cc}"
+    elif which gcc;
+    then
+	set_gerbil_gcc "$(which gcc)"
+    elif which cc ;
+    then
+	set_gerbil_gcc "$(which cc)"
+    else
+
+	echo "ERROR: Cannot find a C compiler.\nSet CC or GERBIL_GCC"  && exit 42	
+    fi
+}
+
+find_gerbil_gcc
+
 std_patch_feature() {
     sed -i -e "$1" src/std/build-features.ss
 }

src/build/build-bach.ss

@@ -12,9 +12,6 @@
 (def (gerbil-gsc)
   (getenv "GERBIL_GSC" default-gerbil-gsc))
 
-(def (gerbil-gcc)
-  (getenv "GERBIL_GCC" "gcc"))
-
 (def gerbil-bindir
   (path-expand "bin" build-home))
 (def gerbil-libdir

src/gerbil/compiler/driver.ss

@@ -10,13 +10,14 @@ namespace: gxc
         "base"
         "compile"
         "optimize")
-(export compile-module compile-exe)
+(export compile-module compile-exe gerbil-gcc)
 
 (extern namespace: #f gerbil-path) ;; needed until bootstrap re-generated
 
 (def default-gerbil-gsc
   (path-expand "gsc" (path-expand "bin" (path-expand "~~"))))
 (def default-gerbil-gcc "gcc")
+(def %default-gerbil-gcc #f)
 (def default-gerbil-ar "ar")
 
 (def +driver-mutex+ (make-mutex 'compiler/driver))
@@ -44,7 +45,9 @@ namespace: gxc
 (def +gerbil-gcc+ #f)
 (def (gerbil-gcc)
   (unless +gerbil-gcc+
-    (set! +gerbil-gcc+ (getenv "GERBIL_GCC" default-gerbil-gcc)))
+    (set! +gerbil-gcc+
+      (getenv "GERBIL_GCC"
+	      (or %default-gerbil-gcc default-gerbil-gcc))))
   +gerbil-gcc+)
 
 (def +gerbil-ar+ #f)
@@ -945,3 +948,6 @@ namespace: gxc
         (raise-compile-error "Compilation error; process exit with nonzero status"
                              [program . args]
                              status)))))
+
+;; Added auto via ./configure
+(set! %default-gerbil-gcc "/opt/local/bin/gcc-mp-13")