From da6c0d2f52390fe7ed6c40f6aa9799edfeb19dcb Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Thu, 5 Mar 2015 13:03:35 -0300 Subject: [PATCH] build: use dolt Drop-in replacement to libtool: http://dolt.freedesktop.org/. More details: http://marc.info/?l=freedesktop-xorg&m=120791871615872&w=3 kmod is relatively fast to compile, so it doesn't matter much. Nonetheless, less forks the better. Compilation time using ./bootstrap-configure --disable-manpages and make -j4 libtool real 0m6.453s user 0m21.067s sys 0m0.773s dolt real 0m4.792s user 0m15.920s sys 0m0.637s --- .gitignore | 2 + configure.ac | 1 + m4/dolt.m4 | 178 +++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 181 insertions(+) create mode 100644 m4/dolt.m4 diff --git a/.gitignore b/.gitignore index 58ef42a7..aa02fbfa 100644 --- a/.gitignore +++ b/.gitignore @@ -18,6 +18,8 @@ /configure /coverage /cov-int +/doltcompile +/doltlibtool /libtool /stamp-h1 /test-suite.log diff --git a/configure.ac b/configure.ac index eb0f9d1c..be597b47 100644 --- a/configure.ac +++ b/configure.ac @@ -17,6 +17,7 @@ AM_MAINTAINER_MODE([enable]) AM_INIT_AUTOMAKE([check-news foreign 1.11 silent-rules tar-pax no-dist-gzip dist-xz subdir-objects color-tests parallel-tests]) AM_SILENT_RULES([yes]) LT_INIT([disable-static pic-only]) +DOLT AS_IF([test "x$enable_static" = "xyes"], [AC_MSG_ERROR([--enable-static is not supported by kmod])]) AS_IF([test "x$enable_largefile" = "xno"], [AC_MSG_ERROR([--disable-largefile is not supported by kmod])]) diff --git a/m4/dolt.m4 b/m4/dolt.m4 new file mode 100644 index 00000000..af76e9d3 --- /dev/null +++ b/m4/dolt.m4 @@ -0,0 +1,178 @@ +dnl dolt, a replacement for libtool +dnl Copyright © 2007-2010 Josh Triplett +dnl Copying and distribution of this file, with or without modification, +dnl are permitted in any medium without royalty provided the copyright +dnl notice and this notice are preserved. +dnl +dnl To use dolt, invoke the DOLT macro immediately after the libtool macros. +dnl Optionally, copy this file into acinclude.m4, to avoid the need to have it +dnl installed when running autoconf on your project. + +AC_DEFUN([DOLT], [ +AC_REQUIRE([AC_CANONICAL_HOST]) +# dolt, a replacement for libtool +# Josh Triplett +AC_PATH_PROG(DOLT_BASH, bash) +AC_MSG_CHECKING([if dolt supports this host]) +dolt_supported=yes +if test x$DOLT_BASH = x; then + dolt_supported=no +fi +if test x$GCC != xyes; then + dolt_supported=no +fi +case $host in +*-*-linux* \ +|amd64-*-freebsd*|i?86-*-freebsd*|ia64-*-freebsd*) + pic_options='-fPIC' + ;; +i?86-apple-darwin*) + pic_options='-fno-common' + ;; +*) + dolt_supported=no + ;; +esac +if test x$dolt_supported = xno ; then + AC_MSG_RESULT([no, falling back to libtool]) + LTCOMPILE='$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(COMPILE)' + LTCXXCOMPILE='$(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CXXCOMPILE)' +else + AC_MSG_RESULT([yes, replacing libtool]) + +dnl Start writing out doltcompile. + cat <<__DOLTCOMPILE__EOF__ >doltcompile +#!$DOLT_BASH +__DOLTCOMPILE__EOF__ + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +args=("$[]@") +for ((arg=0; arg<${#args@<:@@@:>@}; arg++)) ; do + if test x"${args@<:@$arg@:>@}" = x-o ; then + objarg=$((arg+1)) + break + fi +done +if test x$objarg = x ; then + echo 'Error: no -o on compiler command line' 1>&2 + exit 1 +fi +lo="${args@<:@$objarg@:>@}" +obj="${lo%.lo}" +if test x"$lo" = x"$obj" ; then + echo "Error: libtool object file name \"$lo\" does not end in .lo" 1>&2 + exit 1 +fi +objbase="${obj##*/}" +__DOLTCOMPILE__EOF__ + +dnl Write out shared compilation code. + if test x$enable_shared = xyes; then + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +libobjdir="${obj%$objbase}.libs" +if test ! -d "$libobjdir" ; then + mkdir_out="$(mkdir "$libobjdir" 2>&1)" + mkdir_ret=$? + if test "$mkdir_ret" -ne 0 && test ! -d "$libobjdir" ; then + echo "$mkdir_out" 1>&2 + exit $mkdir_ret + fi +fi +pic_object="$libobjdir/$objbase.o" +args@<:@$objarg@:>@="$pic_object" +__DOLTCOMPILE__EOF__ + cat <<__DOLTCOMPILE__EOF__ >>doltcompile +"\${args@<:@@@:>@}" $pic_options -DPIC || exit \$? +__DOLTCOMPILE__EOF__ + fi + +dnl Write out static compilation code. +dnl Avoid duplicate compiler output if also building shared objects. + if test x$enable_static = xyes; then + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +non_pic_object="$obj.o" +args@<:@$objarg@:>@="$non_pic_object" +__DOLTCOMPILE__EOF__ + if test x$enable_shared = xyes; then + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +"${args@<:@@@:>@}" >/dev/null 2>&1 || exit $? +__DOLTCOMPILE__EOF__ + else + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +"${args@<:@@@:>@}" || exit $? +__DOLTCOMPILE__EOF__ + fi + fi + +dnl Write out the code to write the .lo file. +dnl The second line of the .lo file must match "^# Generated by .*libtool" + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +{ +echo "# $lo - a libtool object file" +echo "# Generated by doltcompile, not libtool" +__DOLTCOMPILE__EOF__ + + if test x$enable_shared = xyes; then + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +echo "pic_object='.libs/${objbase}.o'" +__DOLTCOMPILE__EOF__ + else + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +echo pic_object=none +__DOLTCOMPILE__EOF__ + fi + + if test x$enable_static = xyes; then + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +echo "non_pic_object='${objbase}.o'" +__DOLTCOMPILE__EOF__ + else + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +echo non_pic_object=none +__DOLTCOMPILE__EOF__ + fi + + cat <<'__DOLTCOMPILE__EOF__' >>doltcompile +} > "$lo" +__DOLTCOMPILE__EOF__ + +dnl Done writing out doltcompile; substitute it for libtool compilation. + chmod +x doltcompile + LTCOMPILE='$(top_builddir)/doltcompile $(COMPILE)' + LTCXXCOMPILE='$(top_builddir)/doltcompile $(CXXCOMPILE)' + +dnl automake ignores LTCOMPILE and LTCXXCOMPILE when it has separate CFLAGS for +dnl a target, so write out a libtool wrapper to handle that case. +dnl Note that doltlibtool does not handle inferred tags or option arguments +dnl without '=', because automake does not use them. + cat <<__DOLTLIBTOOL__EOF__ > doltlibtool +#!$DOLT_BASH +__DOLTLIBTOOL__EOF__ + cat <<'__DOLTLIBTOOL__EOF__' >>doltlibtool +top_builddir_slash="${0%%doltlibtool}" +: ${top_builddir_slash:=./} +args=() +modeok=false +tagok=false +for arg in "$[]@"; do + case "$arg" in + --silent) : ;; + --mode=compile) modeok=true ;; + --tag=CC|--tag=CXX) tagok=true ;; + *) args@<:@${#args[@]}@:>@="$arg" ;; + esac +done +if $modeok && $tagok ; then + . ${top_builddir_slash}doltcompile "${args@<:@@@:>@}" +else + exec ${top_builddir_slash}libtool "$[]@" +fi +__DOLTLIBTOOL__EOF__ + +dnl Done writing out doltlibtool; substitute it for libtool. + chmod +x doltlibtool + LIBTOOL='$(top_builddir)/doltlibtool' +fi +AC_SUBST(LTCOMPILE) +AC_SUBST(LTCXXCOMPILE) +# end dolt +]) -- 2.39.5