[OE-core] [PATCH 3/3] flex: backport Debian patches to fix generated code warnings

[Otavio Salvador]

The generated parser had warnings regarding signess and return check
which makes Linux Kernel's perf tool from 3.4 release to fail without
those patches.

Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
---
 .../flex/flex/avoid-FORTIFY-warnings.patch         |   59 ++++++++++++++++++++
 .../flex/int-is-not-the-same-size-as-size_t.patch  |   42 ++++++++++++++
 meta/recipes-devtools/flex/flex_2.5.35.bb          |    5 +-
 3 files changed, 105 insertions(+), 1 deletions(-)
 create mode 100644 meta/recipes-devtools/flex/flex/avoid-FORTIFY-warnings.patch
 create mode 100644 meta/recipes-devtools/flex/flex/int-is-not-the-same-size-as-size_t.patch

diff --git a/meta/recipes-devtools/flex/flex/avoid-FORTIFY-warnings.patch b/meta/recipes-devtools/flex/flex/avoid-FORTIFY-warnings.patch
new file mode 100644
index 0000000..c71eb82
--- /dev/null
+++ b/meta/recipes-devtools/flex/flex/avoid-FORTIFY-warnings.patch
@@ -0,0 +1,59 @@
+Wrap ECHO macro to avoid FORTIFY warnings
+
+This change will enable flex scanners to be compiled with
+-D_FORTIFY_SOURCE=2.
+
+Signed-off-by: Manoj Srivastava <srivasta at debian.org>
+Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
+
+Origin: Cherry picked from Debian
+Upstream-Status: Pending
+
+---
+ flex.skl |    2 +-
+ scan.c   |    2 +-
+ skel.c   |    2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/flex.skl b/flex.skl
+index 6ebf2fd..eaa355e 100644
+--- a/flex.skl
++++ b/flex.skl
+@@ -1074,7 +1074,7 @@ m4_ifdef( [[M4_YY_NOT_IN_HEADER]],
+ /* This used to be an fputs(), but since the string might contain NUL's,
+  * we now use fwrite().
+  */
+-#define ECHO fwrite( yytext, yyleng, 1, yyout )
++#define ECHO do { if (fwrite( yytext, yyleng, 1, yyout )) {} } while (0)
+ %endif
+ %if-c++-only C++ definition
+ #define ECHO LexerOutput( yytext, yyleng )
+diff --git a/scan.c b/scan.c
+index d7f5db3..1a079bf 100644
+--- a/scan.c
++++ b/scan.c
+@@ -2093,7 +2093,7 @@ static int input (void );
+ /* This used to be an fputs(), but since the string might contain NUL's,
+  * we now use fwrite().
+  */
+-#define ECHO fwrite( yytext, yyleng, 1, yyout )
++#define ECHO do { if (fwrite( yytext, yyleng, 1, yyout )) {} } while (0)
+ #endif
+ 
+ /* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
+diff --git a/skel.c b/skel.c
+index ee9f6ef..b8a2b4b 100644
+--- a/skel.c
++++ b/skel.c
+@@ -1141,7 +1141,7 @@ const char *skel[] = {
+   "/* This used to be an fputs(), but since the string might contain NUL's,",
+   " * we now use fwrite().",
+   " */",
+-  "#define ECHO fwrite( yytext, yyleng, 1, yyout )",
++  "#define ECHO do { if (fwrite( yytext, yyleng, 1, yyout )) {} } while (0)",
+   "%endif",
+   "%if-c++-only C++ definition",
+   "#define ECHO LexerOutput( yytext, yyleng )",
+-- 
+1.7.9.5
+
diff --git a/meta/recipes-devtools/flex/flex/int-is-not-the-same-size-as-size_t.patch b/meta/recipes-devtools/flex/flex/int-is-not-the-same-size-as-size_t.patch
new file mode 100644
index 0000000..8d05ee4
--- /dev/null
+++ b/meta/recipes-devtools/flex/flex/int-is-not-the-same-size-as-size_t.patch
@@ -0,0 +1,42 @@
+int is not the same size as size_t.
+
+Signed-off-by: Manoj Srivastava <srivasta at debian.org>
+Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
+
+Origin: Cherry picked from Debian
+Upstream-Status: Pending
+
+---
+ gen.c  |    2 +-
+ scan.c |    2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/gen.c b/gen.c
+index 848e2c5..5a5daef 100644
+--- a/gen.c
++++ b/gen.c
+@@ -1890,7 +1890,7 @@ void make_tables ()
+ 			outn ("\tif ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \\");
+ 			outn ("\t\t{ \\");
+ 			outn ("\t\tint c = '*'; \\");
+-			outn ("\t\tint n; \\");
++			outn ("\t\tsize_t n; \\");
+ 			outn ("\t\tfor ( n = 0; n < max_size && \\");
+ 			outn ("\t\t\t     (c = getc( yyin )) != EOF && c != '\\n'; ++n ) \\");
+ 			outn ("\t\t\tbuf[n] = (char) c; \\");
+diff --git a/scan.c b/scan.c
+index 44559b6..15e2058 100644
+--- a/scan.c
++++ b/scan.c
+@@ -2105,7 +2105,7 @@ static int input (void );
+ 	if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
+ 		{ \
+ 		int c = '*'; \
+-		int n; \
++		size_t n; \
+ 		for ( n = 0; n < max_size && \
+ 			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
+ 			buf[n] = (char) c; \
+-- 
+1.7.9.5
+
diff --git a/meta/recipes-devtools/flex/flex_2.5.35.bb b/meta/recipes-devtools/flex/flex_2.5.35.bb
index 28a4f1f..7419f10 100644
--- a/meta/recipes-devtools/flex/flex_2.5.35.bb
+++ b/meta/recipes-devtools/flex/flex_2.5.35.bb
@@ -1,8 +1,11 @@
 require flex.inc
-PR = "r2"
+PR = "r3"
 LICENSE="BSD"
 LIC_FILES_CHKSUM = "file://COPYING;md5=e4742cf92e89040b39486a6219b68067"
 BBCLASSEXTEND = "native"
 
+SRC_URI += "file://avoid-FORTIFY-warnings.patch \
+            file://int-is-not-the-same-size-as-size_t.patch"
+
 SRC_URI[md5sum] = "10714e50cea54dc7a227e3eddcd44d57"
 SRC_URI[sha256sum] = "0becbd4b2b36b99c67f8c22ab98f7f80c9860aec70f0350a0018f29a88704e7b"
-- 
1.7.2.5