1 # Makefile.in generated automatically by automake 1.4 from Makefile.am
3 # Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
4 # This Makefile.in is free software; the Free Software Foundation
5 # gives unlimited permission to copy and/or distribute it,
6 # with or without modifications, as long as this notice is preserved.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
10 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
17 top_srcdir = @top_srcdir@
20 exec_prefix = @exec_prefix@
24 libexecdir = @libexecdir@
26 sysconfdir = @sysconfdir@
27 sharedstatedir = @sharedstatedir@
28 localstatedir = @localstatedir@
32 includedir = @includedir@
33 oldincludedir = /usr/include
37 pkgdatadir = $(datadir)/@PACKAGE@
38 pkglibdir = $(libdir)/@PACKAGE@
39 pkgincludedir = $(includedir)/@PACKAGE@
46 AUTOHEADER = @AUTOHEADER@
49 INSTALL_PROGRAM = @INSTALL_PROGRAM@ $(AM_INSTALL_PROGRAM_FLAGS)
50 INSTALL_DATA = @INSTALL_DATA@
51 INSTALL_SCRIPT = @INSTALL_SCRIPT@
52 transform = @program_transform_name@
60 build_alias = @build_alias@
61 build_triplet = @build@
62 host_alias = @host_alias@
64 target_alias = @target_alias@
65 target_triplet = @target@
70 CPU_FLAGS = @CPU_FLAGS@
71 CSHADOWFLAGS = @CSHADOWFLAGS@
74 DEBUG_FLAGS = @DEBUG_FLAGS@
77 EXTRA_CXX_FLAGS = @EXTRA_CXX_FLAGS@
78 GCC_OBJDIR = @GCC_OBJDIR@
81 GLIBCPP_CFLAGS = @GLIBCPP_CFLAGS@
82 GLIBCPP_CXXFLAGS = @GLIBCPP_CXXFLAGS@
83 LIBMATHOBJS = @LIBMATHOBJS@
84 LIBSTRINGOBJS = @LIBSTRINGOBJS@
91 OPT_LDFLAGS = @OPT_LDFLAGS@
94 SECTION_FLAGS = @SECTION_FLAGS@
95 SECTION_LDFLAGS = @SECTION_LDFLAGS@
97 THREADDEPS = @THREADDEPS@
98 THREADINCS = @THREADINCS@
99 THREADLIBS = @THREADLIBS@
100 THREADOBJS = @THREADOBJS@
101 THREADSPEC = @THREADSPEC@
102 USE_COMPLEX_LONG_DOUBLE = @USE_COMPLEX_LONG_DOUBLE@
105 WFMT_FLAGS = @WFMT_FLAGS@
106 cpu_include_dir = @cpu_include_dir@
107 ctype_include_dir = @ctype_include_dir@
108 glibcpp_basedir = @glibcpp_basedir@
109 ifGNUmake = @ifGNUmake@
110 libinst_wstring_la = @libinst_wstring_la@
112 AUTOMAKE_OPTIONS = 1.3 cygnus
114 # Root level of the include sources.
115 glibcpp_includedir = $(top_srcdir)/include
117 # Passed down for cross compilers, canadian crosses.
118 TOPLEVEL_INCLUDES = -I$(includedir)
119 @GLIBCPP_NEED_LIBIO_TRUE@LIBIO_INCLUDES = -I$(top_builddir)/libio -I$(top_srcdir)/libio
120 @GLIBCPP_NEED_LIBIO_FALSE@LIBIO_INCLUDES =
122 CONFIG_INCLUDES = -I$(top_srcdir)/@cpu_include_dir@ -I$(top_srcdir)/@ctype_include_dir@
125 INCLUDES = -nostdinc++ -I$(top_builddir) -I$(glibcpp_includedir) $(CONFIG_INCLUDES) $(LIBIO_INCLUDES) $(TOPLEVEL_INCLUDES)
128 noinst_LTLIBRARIES = libio.la
130 # These bits are all figured out from configure. Look in acinclude.m4
131 # or configure.in to see how they are set.
132 # NB: DEBUGFLAGS have to be at the end so that -O2 can be overridden.
133 AC_CFLAGS = $(WERROR) @CPU_FLAGS@ @DEBUG_FLAGS@
136 # Need to manually set this option because AC_CXXFLAGS has to be at
137 # the end of the compile line so that -O2 can be overridden as the
138 # occasion call for it. (ie, --enable-debug)
139 AM_CFLAGS = -D_GNU_SOURCE $(AC_CFLAGS)
142 COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(CFLAGS) $(AM_CFLAGS)
145 LTCOMPILE = $(LIBTOOL) --mode=compile $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) \$(CPPFLAGS) $(CFLAGS) $(AM_CFLAGS)
148 LINK = $(LIBTOOL) --mode=link "$(CCLD)" $(CFLAGS) $(AM_CFLAGS) $(LDFLAGS) -o $@
150 libio_headers = libio.h libioP.h iolibio.h
152 # filedoalloc.c genops.c fileops.c stdfiles.c cleanup.c c_codecvt.c
153 @GLIBCPP_NEED_LIBIO_TRUE@LIBIO_SRCS = filedoalloc.c genops.c fileops.c stdfiles.c c_codecvt.c
154 @GLIBCPP_NEED_LIBIO_FALSE@LIBIO_SRCS =
155 @GLIBCPP_NEED_WLIBIO_TRUE@LIBIO_WSRCS = wfiledoalloc.c wfileops.c wgenops.c
156 @GLIBCPP_NEED_WLIBIO_FALSE@LIBIO_WSRCS =
157 @GLIBCPP_NEED_XTRA_LIBIO_TRUE@LIBIO_XTRASRCS = iofwide.c iofclose.c iofopen.c stdio.c
158 @GLIBCPP_NEED_XTRA_LIBIO_FALSE@LIBIO_XTRASRCS =
160 EXTRA_DIST = iostreamP.h
162 libio_la_LIBADD = $(LIBIO_SRCS) $(LIBIO_WSRCS) $(LIBIO_XTRASRCS)
163 libio_la_DEPENDENCIES = $(libio_la_LIBADD)
164 libio_la_SOURCES = $(LIBIO_SRCS) $(LIBIO_WSRCS) $(LIBIO_XTRASRCS)
165 mkinstalldirs = $(SHELL) $(top_srcdir)/../mkinstalldirs
166 CONFIG_HEADER = ../config.h
168 LTLIBRARIES = $(noinst_LTLIBRARIES)
171 DEFS = @DEFS@ -I. -I$(srcdir) -I..
172 CPPFLAGS = @CPPFLAGS@
176 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_FALSE@libio_la_OBJECTS =
177 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@libio_la_OBJECTS = \
178 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@iofwide.lo \
179 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@iofclose.lo \
180 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@iofopen.lo \
181 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@stdio.lo
182 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@libio_la_OBJECTS = \
183 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@filedoalloc.lo \
184 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@genops.lo \
185 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@fileops.lo \
186 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@stdfiles.lo \
187 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@c_codecvt.lo \
188 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@wfiledoalloc.lo \
189 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@wfileops.lo \
190 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@wgenops.lo
191 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@libio_la_OBJECTS = \
192 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@filedoalloc.lo \
193 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@genops.lo \
194 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@fileops.lo \
195 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@stdfiles.lo \
196 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_TRUE@c_codecvt.lo
197 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@libio_la_OBJECTS = \
198 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@filedoalloc.lo \
199 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@genops.lo \
200 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@fileops.lo \
201 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@stdfiles.lo \
202 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@c_codecvt.lo \
203 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@iofwide.lo \
204 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@iofclose.lo \
205 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@iofopen.lo \
206 @GLIBCPP_NEED_WLIBIO_FALSE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@stdio.lo
207 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_FALSE@libio_la_OBJECTS = \
208 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_FALSE@wfiledoalloc.lo \
209 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_FALSE@wfileops.lo \
210 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_FALSE@@GLIBCPP_NEED_LIBIO_FALSE@wgenops.lo
211 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@libio_la_OBJECTS = \
212 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@wfiledoalloc.lo \
213 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@wfileops.lo \
214 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@wgenops.lo \
215 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@iofwide.lo \
216 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@iofclose.lo \
217 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@iofopen.lo \
218 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_FALSE@stdio.lo
219 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@libio_la_OBJECTS = \
220 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@filedoalloc.lo \
221 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@genops.lo \
222 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@fileops.lo \
223 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@stdfiles.lo \
224 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@c_codecvt.lo \
225 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@wfiledoalloc.lo \
226 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@wfileops.lo \
227 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@wgenops.lo \
228 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@iofwide.lo \
229 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@iofclose.lo \
230 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@iofopen.lo \
231 @GLIBCPP_NEED_WLIBIO_TRUE@@GLIBCPP_NEED_XTRA_LIBIO_TRUE@@GLIBCPP_NEED_LIBIO_TRUE@stdio.lo
234 DIST_COMMON = ChangeLog Makefile.am Makefile.in
237 DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST)
241 SOURCES = $(libio_la_SOURCES)
242 OBJECTS = $(libio_la_OBJECTS)
246 .SUFFIXES: .S .c .lo .o .obj .s
247 $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ Makefile.am $(top_srcdir)/configure.in $(ACLOCAL_M4)
248 cd $(top_srcdir) && $(AUTOMAKE) --cygnus libio/Makefile
250 Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
252 && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
255 mostlyclean-noinstLTLIBRARIES:
257 clean-noinstLTLIBRARIES:
258 -test -z "$(noinst_LTLIBRARIES)" || rm -f $(noinst_LTLIBRARIES)
260 distclean-noinstLTLIBRARIES:
262 maintainer-clean-noinstLTLIBRARIES:
267 # FIXME: We should only use cygpath when building on Windows,
268 # and only if it is available.
270 $(COMPILE) -c `cygpath -w $<`
279 -rm -f *.o core *.core
287 maintainer-clean-compile:
290 $(LIBTOOL) --mode=compile $(COMPILE) -c $<
293 $(LIBTOOL) --mode=compile $(COMPILE) -c $<
296 $(LIBTOOL) --mode=compile $(COMPILE) -c $<
306 maintainer-clean-libtool:
308 libio.la: $(libio_la_OBJECTS) $(libio_la_DEPENDENCIES)
309 $(LINK) $(libio_la_LDFLAGS) $(libio_la_OBJECTS) $(libio_la_LIBADD) $(LIBS)
313 ID: $(HEADERS) $(SOURCES) $(LISP)
314 list='$(SOURCES) $(HEADERS)'; \
315 unique=`for i in $$list; do echo $$i; done | \
316 awk ' { files[$$0] = 1; } \
317 END { for (i in files) print i; }'`; \
318 here=`pwd` && cd $(srcdir) \
319 && mkid -f$$here/ID $$unique $(LISP)
321 TAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) $(LISP)
324 list='$(SOURCES) $(HEADERS)'; \
325 unique=`for i in $$list; do echo $$i; done | \
326 awk ' { files[$$0] = 1; } \
327 END { for (i in files) print i; }'`; \
328 test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \
329 || (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags $$unique $(LISP) -o $$here/TAGS)
338 maintainer-clean-tags:
340 distdir = $(top_builddir)/$(PACKAGE)-$(VERSION)/$(subdir)
344 distdir: $(DISTFILES)
345 @for file in $(DISTFILES); do \
346 if test -f $$file; then d=.; else d=$(srcdir); fi; \
347 if test -d $$d/$$file; then \
348 cp -pr $$d/$$file $(distdir)/$$file; \
350 test -f $(distdir)/$$file \
351 || ln $$d/$$file $(distdir)/$$file 2> /dev/null \
352 || cp -p $$d/$$file $(distdir)/$$file || :; \
362 installcheck: installcheck-am
364 install-info: install-info-am
366 install-exec: install-exec-am
369 install-data: install-data-am
372 @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
375 uninstall: uninstall-am
376 all-am: Makefile $(LTLIBRARIES)
379 $(MAKE) $(AM_MAKEFLAGS) AM_INSTALL_PROGRAM_FLAGS=-s install
388 -rm -f Makefile $(CONFIG_CLEAN_FILES)
389 -rm -f config.cache config.log stamp-h stamp-h[0-9]*
391 maintainer-clean-generic:
392 mostlyclean-am: mostlyclean-noinstLTLIBRARIES mostlyclean-compile \
393 mostlyclean-libtool mostlyclean-tags \
396 mostlyclean: mostlyclean-am
398 clean-am: clean-noinstLTLIBRARIES clean-compile clean-libtool \
399 clean-tags clean-generic mostlyclean-am
403 distclean-am: distclean-noinstLTLIBRARIES distclean-compile \
404 distclean-libtool distclean-tags distclean-generic \
408 distclean: distclean-am
410 maintainer-clean-am: maintainer-clean-noinstLTLIBRARIES \
411 maintainer-clean-compile maintainer-clean-libtool \
412 maintainer-clean-tags maintainer-clean-generic \
414 @echo "This command is intended for maintainers to use;"
415 @echo "it deletes files that may require special tools to rebuild."
417 maintainer-clean: maintainer-clean-am
419 .PHONY: mostlyclean-noinstLTLIBRARIES distclean-noinstLTLIBRARIES \
420 clean-noinstLTLIBRARIES maintainer-clean-noinstLTLIBRARIES \
421 mostlyclean-compile distclean-compile clean-compile \
422 maintainer-clean-compile mostlyclean-libtool distclean-libtool \
423 clean-libtool maintainer-clean-libtool tags mostlyclean-tags \
424 distclean-tags clean-tags maintainer-clean-tags distdir info-am info \
425 dvi-am dvi check check-am installcheck-am installcheck install-info-am \
426 install-info install-exec-am install-exec install-data-am install-data \
427 install-am install uninstall-am uninstall all-redirect all-am all \
428 installdirs mostlyclean-generic distclean-generic clean-generic \
429 maintainer-clean-generic clean mostlyclean distclean maintainer-clean
432 # Tell versions [3.59,3.63) of GNU make to not export all variables.
433 # Otherwise a system limit (for SysV at least) may be exceeded.