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doc/with-mini-gmp.patch
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Vincent Lefèvre
[doc/with-mini-gmp.patch] Updated comment.
01 окт 2018, 16:54
01 окт 2018, 16:54
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[Part of changesets r13214,13217,13224,13225,13228,13229] These were the modifications to configure.ac and src/Makefile.am needed for --with-mini-gmp support (these are just those related to the autotools, changes to the MPFR source not included, and changes in temporary comments not included either). This works with GNU Automake 1.16, but not with earlier versions, due to a bug fixed in 1.16; in Automake 1.16 NEWS file: - Automatic dependency tracking has been fixed to work also when the 'subdir-object' option is used and some 'foo_SOURCES' definition contains unexpanded references to make variables, as in, e.g.: a_src = sources/libs/aaa b_src = sources/bbb foo_SOURCES = $(a_src)/bar.c $(b_src)/baz.c With such a setup, the created makefile fragment containing dependency tracking information will be correctly placed under the directories named 'sources/libs/aaa/.deps' and 'sources/bbb/.deps', rather than mistakenly under directories named (literally!) '$(src_a)/.deps' and '$(src_b)/.deps' (this was the first part of automake bug#13928). Notice that in order to fix this bug we had to slightly change the semantics of how config.status bootstraps the makefile fragments required for the dependency tracking to work: rather than attempting to parse the Makefiles via grep and sed trickeries only, we actually invoke 'make' on a slightly preprocessed version of those Makefiles, using a private target that is only meant to bootstrap the required makefile fragments. The code has been changed in r13235 to avoid this Automake bug. Index: configure.ac =================================================================== --- configure.ac (revision 13213) +++ configure.ac (working copy) @@ -32,7 +32,9 @@ dnl tested, and many things have changed in 1.13. Moreover the INSTALL file dnl and MPFR manual assume that MPFR has been built using Automake 1.13+ dnl (due to parallel tests, introduced by default in Automake 1.13). -AM_INIT_AUTOMAKE([1.13 no-define dist-bzip2 dist-xz dist-zip]) +dnl The subdir-objects option is needed due to configuration related to +dnl mini-gmp, which has sources in an external directory. +AM_INIT_AUTOMAKE([1.13 no-define dist-bzip2 dist-xz dist-zip subdir-objects]) AM_MAINTAINER_MODE(enable) AC_CONFIG_MACRO_DIR([m4]) @@ -121,6 +123,26 @@ fi ]) +AC_ARG_WITH(mini_gmp, + [ --with-mini-gmp=DIR use mini-gmp (sources in DIR) instead of GMP + (experimental, please read doc/mini-gmp file)], + [ + MPFR_PARSE_DIRECTORY(["$withval"],[withval]) + if test -z "$gmp_lib_path" && test -z "$with_gmp_include" && \ + test -z "$use_gmp_build"; then + if test -f "$withval/mini-gmp.c" && test -f "$withval/mini-gmp.h"; then + AC_DEFINE([MPFR_USE_MINI_GMP],1,[Use mini-gmp]) + CPPFLAGS="$CPPFLAGS -I$withval" + mini_gmp_path="$withval" + AC_SUBST(mini_gmp_path) + else + AC_MSG_FAILURE([mini-gmp.{c,h} not found in $withval]) + fi + else + AC_MSG_FAILURE([Do not use --with-mini-gmp and other --with-gmp options simultaneously.]) + fi + ]) + AC_ARG_WITH(mulhigh_size, [ --with-mulhigh-size=NUM internal threshold table for mulhigh], AC_DEFINE_UNQUOTED([MPFR_MULHIGH_SIZE],$withval, [Mulhigh size])) @@ -204,7 +226,10 @@ *) AC_MSG_ERROR([bad value for --enable-tune-for-coverage]) ;; esac]) +dnl Makefile.am files can use "if MINI_GMP" / ... / "endif". +AM_CONDITIONAL([MINI_GMP], [test -n "$mini_gmp_path"]) + dnl dnl Setup CC and CFLAGS dnl @@ -520,10 +545,61 @@ LIBS="$old_LIBS" AC_SUBST(TUNE_LIBS) +dnl Under Linux, make sure that the old dtags are used if LD_LIBRARY_PATH +dnl is defined. The issue is that with the new dtags, LD_LIBRARY_PATH has +dnl the precedence over the run path, so that if a compatible MPFR library +dnl is installed in some directory from $LD_LIBRARY_PATH, then the tested +dnl MPFR library will be this library instead of the MPFR library from the +dnl build tree. Other OS with the same issue might be added later. dnl -dnl Setup GMP detection +dnl References: +dnl https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859732 +dnl http://lists.gnu.org/archive/html/libtool/2017-05/msg00000.html dnl +dnl We need to check whether --disable-new-dtags is supported as alternate +dnl linkers may be used (e.g., with tcc: CC=tcc LD=tcc). +dnl +case $host in + *-*-linux*) + if test -n "$LD_LIBRARY_PATH"; then + saved_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,--disable-new-dtags" + AC_MSG_CHECKING(whether --disable-new-dtags is supported by the linker) + AC_LINK_IFELSE([AC_LANG_SOURCE([[ +int main (void) { return 0; } + ]])], + [AC_MSG_RESULT(yes (use it since LD_LIBRARY_PATH is set))], + [AC_MSG_RESULT(no) + LDFLAGS="$saved_LDFLAGS" + ]) + fi + ;; +esac +dnl +dnl For mpfr-longlong.h - TODO: should be replaced (see acinclude.m4). +dnl + +GMP_C_ATTRIBUTE_MODE + + +dnl +dnl Setup related to GMP / mini-gmp +dnl + +if test -z "$mini_gmp_path" ; then + +dnl Setup for GMP + +dnl Avoid a configure failure with automatic dependency tracking due to +dnl libminigmp_la_SOURCES = $(mini_gmp_path)/mini-gmp.h [...] +dnl in src/Makefile.am; this failure comes from the fact that lines with +dnl $(mini_gmp_path)/$(DEPDIR)/... are added to src/Makefile even though +dnl the rules related to $(mini_gmp_path) are in an Automake conditional +dnl that is false when $mini_gmp_path is an empty string. This is probably +dnl a bug in Automake. +mini_gmp_path=. + dnl Check GMP Header AC_MSG_CHECKING(for gmp.h) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ @@ -577,48 +653,6 @@ ;; esac -dnl Under Linux, make sure that the old dtags are used if LD_LIBRARY_PATH -dnl is defined. The issue is that with the new dtags, LD_LIBRARY_PATH has -dnl the precedence over the run path, so that if a compatible MPFR library -dnl is installed in some directory from $LD_LIBRARY_PATH, then the tested -dnl MPFR library will be this library instead of the MPFR library from the -dnl build tree. Other OS with the same issue might be added later. -dnl -dnl References: -dnl https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859732 -dnl http://lists.gnu.org/archive/html/libtool/2017-05/msg00000.html -dnl -dnl We need to check whether --disable-new-dtags is supported as alternate -dnl linkers may be used (e.g., with tcc: CC=tcc LD=tcc). -dnl -case $host in - *-*-linux*) - if test -n "$LD_LIBRARY_PATH"; then - saved_LDFLAGS="$LDFLAGS" - LDFLAGS="$LDFLAGS -Wl,--disable-new-dtags" - AC_MSG_CHECKING(whether --disable-new-dtags is supported by the linker) - AC_LINK_IFELSE([AC_LANG_SOURCE([[ -int main (void) { return 0; } - ]])], - [AC_MSG_RESULT(yes (use it since LD_LIBRARY_PATH is set))], - [AC_MSG_RESULT(no) - LDFLAGS="$saved_LDFLAGS" - ]) - fi - ;; -esac - -dnl -dnl For mpfr-longlong.h - TODO: should be replaced (see acinclude.m4). -dnl - -GMP_C_ATTRIBUTE_MODE - - -dnl -dnl Setup GMP detection (continued) -dnl - dnl Check minimal GMP version dnl We only guarantee that with a *functional* and recent enough GMP version, dnl MPFR will compile; we do not guarantee that GMP will compile. @@ -777,6 +811,27 @@ MPFR_CHECK_MP_LIMB_T_VS_LONG MPFR_CHECK_MP_LIMB_T_VS_INTMAX +else + +dnl Setup for mini-gmp + +dnl First check whether mini-gmp defines GMP_NUMB_BITS. +AC_MSG_CHECKING(for GMP_NUMB_BITS) +how="from mini-gmp.h" +AC_COMPUTE_INT(mini_gmp_numb_bits, [(GMP_NUMB_BITS)], + [#include <mini-gmp.h>], + [how="not in mini-gmp.h; guessed" + AC_COMPUTE_INT(mini_gmp_numb_bits, [(sizeof(unsigned long) * CHAR_BIT)], + [#include <limits.h>], + [AC_MSG_FAILURE([cannot define GMP_NUMB_BITS])]) + AC_DEFINE_UNQUOTED([GMP_NUMB_BITS], $mini_gmp_numb_bits, [number of bits in a limb]) + ]) +AC_MSG_RESULT([$mini_gmp_numb_bits bits ($how)]) + +fi + +dnl End of setup related to GMP / mini-gmp + dnl The getrusage function is needed for MPFR bench (cf tools/bench) AC_CHECK_FUNCS([getrusage]) Index: src/Makefile.am =================================================================== --- src/Makefile.am (revision 13213) +++ src/Makefile.am (working copy) @@ -17,6 +17,7 @@ x86/mparam.h x86_64/core2/mparam.h x86_64/mparam.h include_HEADERS = mpfr.h mpf2mpfr.h +nodist_include_HEADERS = BUILT_SOURCES = mparam.h @@ -91,6 +92,20 @@ $(srcdir)/get_patches.c: $(top_srcdir)/PATCHES $(top_srcdir)/tools/get_patches.sh (cd $(top_srcdir) && ./tools/get_patches.sh) > $@ || rm -f $@ +if MINI_GMP +# The mini-gmp.{c,h} files are external files, not part of MPFR, thus they +# must not be put in the tarballs by "make dist". Hence the use of nodist_ +# on the corresponding sources (this is needed even when --with-mini-gmp +# has not been used). +nodist_include_HEADERS += $(mini_gmp_path)/mini-gmp.h +# The noinst_ below seems OK as libminigmp should be included in libmpfr, +# and this is confirmed by ldd (replacing noinst_ by lib_ does not seem to +# do this and makes linking of the test programs fail). +noinst_LTLIBRARIES = libminigmp.la +nodist_libminigmp_la_SOURCES = $(mini_gmp_path)/mini-gmp.h $(mini_gmp_path)/mini-gmp.c +libmpfr_la_LIBADD += libminigmp.la +endif + # For check-gmp-symbols GMPC = $(top_builddir)/src/gmp.c GMPI = $(top_builddir)/src/gmp.i