examples/c/reccalc/local.mk

   1 ## Copyright (C) 2019-2021 Free Software Foundation, Inc.
   2 ##
   3 ## This program is free software: you can redistribute it and/or modify
   4 ## it under the terms of the GNU General Public License as published by
   5 ## the Free Software Foundation, either version 3 of the License, or
   6 ## (at your option) any later version.
   7 ##
   8 ## This program is distributed in the hope that it will be useful,
   9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 ## GNU General Public License for more details.
  12 ##
  13 ## You should have received a copy of the GNU General Public License
  14 ## along with this program.  If not, see <https://www.gnu.org/licenses/>.
  15
  16 reccalcdir = $(docdir)/%D%
  17
  18 ## --------- ##
  19 ## RecCalc.  ##
  20 ## --------- ##
  21
  22 if FLEX_WORKS
  23   check_PROGRAMS += %D%/reccalc
  24   TESTS += %D%/reccalc.test
  25   nodist_%C%_reccalc_SOURCES = %D%/parse.y %D%/scan.h %D%/scan.c
  26   BUILT_SOURCES += $(nodist_%C%_reccalc_SOURCES)
  27   # Don't use gnulib's system headers.
  28   %C%_reccalc_CPPFLAGS = -I$(top_srcdir)/%D% -I$(top_builddir)/%D%
  29   # Fighting warnings triggered by Flex is just too painful.
  30   # %C%_reccalc_CFLAGS = $(TEST_CFLAGS)
  31 endif FLEX_WORKS
  32
  33 %D%/parse.c: $(dependencies)
  34
  35 # Tell Make that parse.o depends on scan.h, so that scan.h is built
  36 # before parse.o.  Obfuscate the name of the target, otherwise
  37 # Automake removes its recipe for parse.o and leaves only our
  38 # additional dependency.
  39 DASH = -
  40 %D%/reccalc$(DASH)parse.o: %D%/scan.h
  41 # Tell Make scan.o depends on parse.h, except that Make sees only
  42 # parse.c, not parse.h.  We can't use BUILT_SOURCES to this end, since
  43 # we use the built bison.
  44 %D%/reccalc$(DASH)scan.o: %D%/parse.c
  45
  46 # Likewise, but for Automake before 1.16.
  47 %D%/examples_c_reccalc_reccalc$(DASH)parse.o: %D%/scan.h
  48 %D%/examples_c_reccalc_reccalc$(DASH)scan.o: %D%/parse.c
  49
  50 ## See "info automake 'Multiple Outputs'" for this rule.
  51 %D%/scan.c %D%/scan.h: %D%/scan.stamp
  52 ## Recover from the removal of $@
  53         @if test -f $@; then :; else \
  54           trap 'rm -rf %D%/scan.lock %D%/scan.stamp' 1 2 13 15; \
  55 ## mkdir is a portable test-and-set
  56           if mkdir %D%/scan.lock 2>/dev/null; then \
  57 ## This code is being executed by the first process.
  58             rm -f %D%/scan.stamp; \
  59             $(MAKE) $(AM_MAKEFLAGS) %D%/scan.stamp; \
  60             result=$$?; rm -rf %D%/scan.lock; exit $$result; \
  61           else \
  62 ## This code is being executed by the follower processes.
  63 ## Wait until the first process is done.
  64             while test -d %D%/scan.lock; do sleep 1; done; \
  65 ## Succeed if and only if the first process succeeded.
  66             test -f %D%/scan.stamp; \
  67           fi; \
  68         fi
  69
  70 %D%/scan.stamp: %D%/scan.l
  71         $(AM_V_LEX)rm -f $@ $@.tmp
  72         $(AM_V_at)$(MKDIR_P) %D%
  73         $(AM_V_at)touch $@.tmp
  74 ## --header introduced in 2.5.6, renamed as --header-file in 2.6.4.
  75 ## Backward compatibility ensured since --header is an unambiguous prefix.
  76         $(AM_V_at)$(LEX) $(AM_LFLAGS) $(LFLAGS) -o%D%/scan.c --header=%D%/scan.h $(srcdir)/%D%/scan.l
  77         $(AM_V_at)mv $@.tmp $@
  78
  79
  80 EXTRA_DIST += %D%/reccalc.test %D%/scan.l
  81 dist_reccalc_DATA = %D%/parse.y %D%/scan.l %D%/Makefile %D%/README.md
  82 CLEANFILES += %D%/parse.[ch] %D%/parse.output %D%/scan.[ch] %D%/*.stamp
  83 CLEANDIRS += %D%/*.dSYM