Suppress "unused variable" warnings with older versions of flex.
Versions of flex before 2.5.36 might generate code that results in an
"unused variable" warning, when using %option reentrant. Historically
we've worked around that by specifying -Wno-error, but that's an
unsatisfying solution. The official "fix" for this was just to insert a
dummy reference to the variable, so write a small perl script that edits
the generated C code similarly.
The MSVC side of this is untested, but the buildfarm should soon reveal
if I broke that.
Discussion: https://postgr.es/m/25456.1487437842@sss.pgh.pa.us
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/65d508fd4decee4d5a54c1e7b93acd25d5e80556
Modified Files
--------------
src/Makefile.global.in | 1 +
src/backend/parser/Makefile | 7 +----
src/bin/psql/Makefile | 6 +---
src/fe_utils/Makefile | 6 +---
src/tools/fix-flex-warning.pl | 65 +++++++++++++++++++++++++++++++++++++++++++
src/tools/msvc/pgflex.pl | 20 ++++++++-----
6 files changed, 82 insertions(+), 23 deletions(-)