Add a wrapper function around the lexer.

We rename the generated lexer from yylex to glcpp_lex. Then we
implement our own yylex function in glcpp-parse.y that calls
glcpp_lex. This doesn't change the behavior at all yet, but gives us a
place where we can do implement alternate lexing in the future.

(We want this because instead of re-lexing from strings for macro
expansion, we want to lex from pre-parsed token lists. We need this so
that when we terminate recursion due to an already active macro
expansion, we can ensure that that symbol never gets expanded again
later.)

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 3fa863c..8811612 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ glcpp: glcpp.o glcpp-lex.o glcpp-parse.o hash_table.o xtalloc.o
 	bison --debug --defines=$*.h --output=$*.c $^
 
 %.c: %.l
-	flex --outfile=$@ $<
+	flex --prefix=glcpp_ --outfile=$@ $<
 
 glcpp-lex.c: glcpp-parse.h