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52ce2a008b
pstate_clear is lacking a prototype. Reported by Ryan https://lists.gnu.org/r/bug-bison/2020-05/msg00101.html Besides, none of the C examples were compiled with the warning flags. * configure.ac (warn_c): Add -Wmissing-prototypes. * data/skeletons/yacc.c (pstate_clear): Make it static. * examples/local.mk (TEST_CFLAGS): New. * examples/c/bistromathic/local.mk, examples/c/calc/local.mk, * examples/c/lexcalc/local.mk, examples/c/mfcalc/local.mk, * examples/c/pushcalc/local.mk, examples/c/reccalc/local.mk, * examples/c/rpcalc/local.mk: Use it. GCC's warn_unused_result is not silenced by a cast to void, so we have to "use" scanf's result. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425 Flex generated code produces too many warnings, including things such as, with ICC: examples/c/lexcalc/scan.c(1088): error #1682: implicit conversion of a 64-bit integral type to a smaller integral type (potential portability problem) 2259 YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]), 2260 ^ 2261 2262 I am tired of trying to fix Flex's output. The project does not seem maintained. We ought to avoid it. So, for the time being, don't try to enable warnings with Flex. * examples/c/bistromathic/parse.y, examples/c/reccalc/scan.l: Fix warnings. * doc/bison.texi: Discard scanf's return value to defeat -Werror=unused-result.
84 lines
3.1 KiB
Makefile
84 lines
3.1 KiB
Makefile
## Copyright (C) 2019-2020 Free Software Foundation, Inc.
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##
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## This program is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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reccalcdir = $(docdir)/%D%
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## --------- ##
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## RecCalc. ##
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## --------- ##
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if FLEX_WORKS
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check_PROGRAMS += %D%/reccalc
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TESTS += %D%/reccalc.test
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nodist_%C%_reccalc_SOURCES = %D%/parse.y %D%/scan.h %D%/scan.c
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BUILT_SOURCES += $(nodist_%C%_reccalc_SOURCES)
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# Don't use gnulib's system headers.
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%C%_reccalc_CPPFLAGS = -I$(top_srcdir)/%D% -I$(top_builddir)/%D%
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# Fighting warnings triggered by Flex is just too painful.
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# %C%_reccalc_CFLAGS = $(TEST_CFLAGS)
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endif FLEX_WORKS
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%D%/parse.c: $(dependencies)
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# Tell Make that parse.o depends on scan.h, so that scan.h is built
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# before parse.o. Obfuscate the name of the target, otherwise
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# Automake removes its recipe for parse.o and leaves only our
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# additional dependency.
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DASH = -
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%D%/reccalc$(DASH)parse.o: %D%/scan.h
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# Tell Make scan.o depends on parse.h, except that Make sees only
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# parse.c, not parse.h. We can't use BUILT_SOURCES to this end, since
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# we use the built bison.
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%D%/reccalc$(DASH)scan.o: %D%/parse.c
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# Likewise, but for Automake before 1.16.
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%D%/examples_c_reccalc_reccalc$(DASH)parse.o: %D%/scan.h
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%D%/examples_c_reccalc_reccalc$(DASH)scan.o: %D%/parse.c
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## See "info automake 'Multiple Outputs'" for this rule.
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%D%/scan.c %D%/scan.h: %D%/scan.stamp
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## Recover from the removal of $@
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@if test -f $@; then :; else \
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trap 'rm -rf %D%/scan.lock %D%/scan.stamp' 1 2 13 15; \
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## mkdir is a portable test-and-set
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if mkdir %D%/scan.lock 2>/dev/null; then \
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## This code is being executed by the first process.
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rm -f %D%/scan.stamp; \
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$(MAKE) $(AM_MAKEFLAGS) %D%/scan.stamp; \
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result=$$?; rm -rf %D%/scan.lock; exit $$result; \
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else \
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## This code is being executed by the follower processes.
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## Wait until the first process is done.
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while test -d %D%/scan.lock; do sleep 1; done; \
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## Succeed if and only if the first process succeeded.
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test -f %D%/scan.stamp; \
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fi; \
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fi
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%D%/scan.stamp: %D%/scan.l
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$(AM_V_LEX)rm -f $@ $@.tmp
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$(AM_V_at)$(MKDIR_P) %D%
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$(AM_V_at)touch $@.tmp
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## --header introduced in 2.5.6, renamed as --header-file in 2.6.4.
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## Backward compatibility ensured since --header is an unambiguous prefix.
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$(AM_V_at)$(LEX) $(AM_LFLAGS) $(LFLAGS) -o%D%/scan.c --header=%D%/scan.h $(srcdir)/%D%/scan.l
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$(AM_V_at)mv $@.tmp $@
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EXTRA_DIST += %D%/reccalc.test %D%/scan.l
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dist_reccalc_DATA = %D%/parse.y %D%/scan.l %D%/Makefile %D%/README.md
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CLEANFILES += %D%/parse.[ch] %D%/parse.output %D%/scan.[ch] %D%/*.stamp
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CLEANDIRS += %D%/*.dSYM
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