This is a three-part for building guile with clang (or with any other

modern compiler):

1) Use -fwrap in CFLAGS, since guile depends on integer overflows.
2) Fix grep + sed logic in guile-snarf.in to be compatible with the output
   of clang's preprocessor.  This is achieved by adding additional newlines
   before the ^^ delimiters, which guile-snarf depends on.
3) Similarly, in c-tokenize.c, clang's preprocessor outputs EOLs and hash
   marks in different places, confusing the lexer.  Simply don't output
   them to fix the problem.

While here strip binaries and libraries.

Submitted by:	dim@

lang/guile/Makefile

@@ -4,6 +4,7 @@
 
 PORTNAME=	guile
 PORTVERSION=	1.8.8
+PORTREVISION=	1
 CATEGORIES=	lang scheme
 MASTER_SITES=	${MASTER_SITE_GNU}
 MASTER_SITE_SUBDIR=	guile
@@ -19,6 +20,8 @@ GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 LDFLAGS+=	-L${LOCALBASE}/lib
 CPPFLAGS+=	-I${LOCALBASE}/include
+CFLAGS+=	-fwrapv
+INSTALL_TARGET=	install-strip
 
 GUILE_VER=	1.8
 PLIST_SUB=	GUILE_VER=${GUILE_VER}

lang/guile/files/patch-libguile_c-tokenize.c

@@ -0,0 +1,18 @@
+--- libguile/c-tokenize.c	2010-12-13 20:24:04.000000000 +0100
++++ libguile/c-tokenize.c	2014-04-13 22:20:33.000000000 +0200
+@@ -898,13 +898,13 @@ case 3:
+ /* rule 3 can match eol */
+ YY_RULE_SETUP
+ #line 71 "./c-tokenize.lex"
+-{ OUT(eol); }
++{ /*OUT(eol);*/ }
+ 	YY_BREAK
+ case 4:
+ /* rule 4 can match eol */
+ YY_RULE_SETUP
+ #line 73 "./c-tokenize.lex"
+-{ OUT(hash); IS_NOT_COOKIE; }
++{ /*OUT(hash);*/ IS_NOT_COOKIE; }
+ 	YY_BREAK
+ case 5:
+ YY_RULE_SETUP

lang/guile/files/patch-libguile_guile-snarf.in

@@ -0,0 +1,12 @@
+--- libguile/guile-snarf.in	2010-12-13 18:24:40.000000000 +0100
++++ libguile/guile-snarf.in	2014-04-13 21:05:42.000000000 +0200
+@@ -51,7 +51,8 @@ modern_snarf ()                         
+     ## empty file.
+     echo "/* cpp arguments: $@ */" ;
+     ${cpp} -DSCM_MAGIC_SNARF_INITS -DSCM_MAGIC_SNARFER "$@" > ${temp} && cpp_ok_p=true
+-    grep "^ *\^ *\^" ${temp} | sed -e "s/^ *\^ *\^//" -e "s/\^\ *:\ *\^.*/;/"
++    sed -e 's/\^ *\^/\
++^^/g' ${temp} | grep "^.*\^ *\^" | sed -e "s/^.*\^ *\^//" -e "s/\^\ *:\ *\^.*/;/"
+ }
+ 
+ ## main