Armin Friedl
5ef0aff5b5
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flex (and libfl) expect a symbol yyflex. This symbol is overwritten and expected to be cool_yyflex in the cool compiler. This patch makes both happy. In addition fixes name mangling issues with c++ compilers which otherwise may mangle yyflex (which is a fixed symbol in c-compiled libfl).
20 lines
672 B
Diff
20 lines
672 B
Diff
--- cool.flex 2011-06-18 03:22:02.000000000 +0000
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+++ cool.flex.work 2020-12-19 22:43:35.902153646 +0000
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@@ -12,6 +12,17 @@
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#include <stringtab.h>
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#include <utilities.h>
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+/* This is a hack to
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+ * a) satisfy the cool compiler which expects yylex to be named cool_yylex (see below)
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+ * b) satisfy libfl > 2.5.39 which expects a yylex symbol
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+ * c) fix mangling errors of yylex when compiled with a c++ compiler
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+ * d) be as non-invasive as possible to the existing assignment code
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+ */
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+extern int cool_yylex();
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+extern "C" {
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+ int (&yylex) (void) = cool_yylex;
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+}
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+
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/* The compiler assumes these identifiers. */
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#define yylval cool_yylval
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#define yylex cool_yylex
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