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Adjust yywrap macro for non-reentrant scanners for MSVC.

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The MSVC compiler complains if a macro is called with less arguments
than its definition provides for. flex generates a macro with one
argument for yywrap, but only supplies the argument for reentrant
scanners, so we remove the useless argument in the non-reentrant
case to silence the warning.
This commit is contained in:
Andrew Dunstan 2011-04-25 09:10:59 -04:00
parent 5948a6eeaa
commit 08a0c2dabc
1 changed files with 11 additions and 1 deletions
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12
src/tools/msvc/pgflex.bat
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@ -25,9 +25,19 @@ if "%1" == "contrib\seg\segscan.l" call :generate %1 contrib\seg\segscan.c
echo Unknown flex input: %1
exit 1
REM For non-reentrant scanners we need to fix up the yywrap macro definition
REM to keep the MS compiler happy.
REM For reentrant scanners (like the core scanner) we do not
REM need to (and must not) change the yywrap definition.
:generate
flex %3 -o%2 %1
exit %errorlevel%
if errorlevel 1 exit %errorlevel%
perl -n -e "exit 1 if /^\%%option\s+reentrant/;" %1
if errorlevel 1 exit 0
perl -pi.bak -e "s/yywrap\(n\)/yywrap()/;" %2
if errorlevel 1 exit %errorlevel%
del %2.bak
exit 0
:noflex
echo WARNING! flex install not found, attempting to build without