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| author | Yao Qi <yao.qi@linaro.org> | 2016-11-03 16:09:42 +0000 |
|---|---|---|
| committer | Yao Qi <yao.qi@linaro.org> | 2016-11-03 16:09:42 +0000 |
| commit | 722bcb33bf0383487c1af0e7d401e30301e94e2b (patch) | |
| tree | c290198bce996f10c3cfae16a164fdabc9a318a0 /gdb/Makefile.in | |
| parent | 034b77cf7875c4ea5aaf3d06dfea2e422abc47db (diff) | |
Replace YY_NULL with YY_NULLPTR in LANG-exp.c
As we require c++11, GDB fails to build if bison is not new enough.
I see the following error on the system (fedora 19) that bison is
2.6.4,
g++ -std=gnu++11 .... \
-c -o ada-exp.o -MT ada-exp.o -MMD -MP -MF .deps/ada-exp.Tpo 'if test -f ada-exp.c; then echo ada-exp.c; else echo ../../binutils-gdb/gdb/ada-exp.c; fi`
In file included from ../../binutils-gdb/gdb/ada-exp.y:731:0:
ada-lex.c:113:0: error: "YY_NULL" redefined [-Werror]
#define YY_NULL 0
^
ada-exp.c:158:0: note: this is the location of the previous definition
# define YY_NULL nullptr
^
cc1plus: all warnings being treated as errors
make: *** [ada-exp.o] Error 1
Both ada-exp.c and ada-lex.c has macro YY_NULL, like this,
$ cat 1.c
# ifndef YY_NULL
# if defined __cplusplus && 201103L <= __cplusplus
# define YY_NULL nullptr
# else
# define YY_NULL 0
# endif
# endif
#define YY_NULL 0
as we can see, YY_NULL is defined differently (nullptr vs 0)
$ g++ -std=c++11 -Wall 1.c -c
1.c:9:0: warning: "YY_NULL" redefined
#define YY_NULL 0
^
1.c:3:0: note: this is the location of the previous definition
# define YY_NULL nullptr
^
$ g++ -Wall 1.c -c
bison renames YY_NULL to YY_NULLPTR in 2013 Nov,
https://lists.gnu.org/archive/html/bison-patches/2013-11/msg00002.html
and bison released later than 2013 Nov have this patch. Bison 3.0.2,
released on 2013 Dec, is OK.
The fix is to replace YY_NULL with YY_NULLPTR via sed. With old bison,
YY_NULL becomes YY_NULLPTR; with new bison, YY_NULLPTR becomes
YY_NULLPTRPTR,
gdb:
2016-11-03 Yao Qi <yao.qi@linaro.org>
* Makefile.in (.y.c): Replace YY_NULL with YY_NULLPTR.
Diffstat (limited to 'gdb/Makefile.in')
| -rw-r--r-- | gdb/Makefile.in | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gdb/Makefile.in b/gdb/Makefile.in index d035d8e242..6db63c7e90 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -1894,6 +1894,7 @@ po/$(PACKAGE).pot: force -e 's/\([ \t;,(]\)free\([ \t]*[&(),]\)/\1xfree\2/g' \ -e 's/\([ \t;,(]\)free$$/\1xfree/g' \ -e '/^#line.*y.tab.c/d' \ + -e 's/YY_NULL/YY_NULLPTR/g' \ < $@.tmp > $@ rm -f $@.tmp .l.c: |