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examples: don't run those that require f?lex when it's not available

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Reported by Bruno Haible.
http://lists.gnu.org/archive/html/bug-bison/2019-05/msg00026.html

* configure.ac (FLEX_WORKS): New.
* examples/c/lexcalc/local.mk, examples/c/reccalc/local.mk: Use it.
This commit is contained in:
Akim Demaille
2019-05-19 18:38:02 +02:00
parent c8e57e8159
commit 1934304acf
3 changed files with 20 additions and 14 deletions
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16
examples/c/lexcalc/local.mk
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@@ -19,15 +19,17 @@ lexcalcdir = $(docdir)/%D%
## Calc. ##
## ------ ##
check_PROGRAMS += %D%/lexcalc
TESTS += %D%/lexcalc.test
EXTRA_DIST += %D%/lexcalc.test
nodist_%C%_lexcalc_SOURCES = %D%/parse.y %D%/parse.h %D%/scan.l
if FLEX_WORKS
check_PROGRAMS += %D%/lexcalc
TESTS += %D%/lexcalc.test
nodist_%C%_lexcalc_SOURCES = %D%/parse.y %D%/parse.h %D%/scan.l
# Don't use gnulib's system headers.
%C%_lexcalc_CPPFLAGS = -I$(top_srcdir)/%D% -I$(top_builddir)/%D%
endif FLEX_WORKS
%D%/parse.c: $(dependencies)
# Don't use gnulib's system headers.
%C%_lexcalc_CPPFLAGS = -I$(top_srcdir)/%D% -I$(top_builddir)/%D%
EXTRA_DIST += %D%/lexcalc.test
dist_lexcalc_DATA = %D%/parse.y %D%/scan.l %D%/Makefile %D%/README.md
CLEANFILES += %D%/parse.[ch] %D%/scan.c %D%/parse.output
CLEANDIRS += %D%/*.dSYM