Add flag for -pg.

Makefile.am

@@ -37,6 +37,10 @@ if IS_COVERAGE
 CFLAGS += -g -O0 --coverage
 LDFLAGS += --coverage
 endif
+if IS_PROFILE
+CFLAGS += -g -O0 -pg
+LDFLAGS += -pg
+endif
 CPPFLAGS += -iquote.
 endif
 

configure.ac

@@ -40,6 +40,14 @@ AC_ARG_ENABLE(
 )
 AM_CONDITIONAL(IS_COVERAGE, test "x$found_coverage" = xyes)
 
+# Is this --enable-profile?
+AC_ARG_ENABLE(
+	profile,
+	AC_HELP_STRING(--enable-profile, enable profile build flags),
+	found_profile=$enable_profile
+)
+AM_CONDITIONAL(IS_PROFILE, test "x$found_profile" = xyes)
+
 # Is this a static build?
 AC_ARG_ENABLE(
 	static,