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Diffstat (limited to 'm4/xc-am-iface.m4')
| -rw-r--r-- | m4/xc-am-iface.m4 | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/m4/xc-am-iface.m4 b/m4/xc-am-iface.m4 new file mode 100644 index 0000000..71564a0 --- /dev/null +++ b/m4/xc-am-iface.m4 @@ -0,0 +1,240 @@ +#--------------------------------------------------------------------------- +# +# xc-am-iface.m4 +# +# Copyright (c) 2013 Daniel Stenberg <daniel@haxx.se> +# +# Permission to use, copy, modify, and distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +# +#--------------------------------------------------------------------------- + +# serial 1 + + +dnl _XC_AUTOMAKE_BODY +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl This macro performs embedding of automake initialization +dnl code into configure script. When automake version 1.14 or +dnl newer is used at configure script generation time, this +dnl results in 'subdir-objects' automake option being used. +dnl When using automake versions older than 1.14 this option +dnl is not used when generating configure script. + +m4_define([_XC_AUTOMAKE_BODY], +[dnl +## --------------------------------------- ## +## Start of automake initialization code ## +## --------------------------------------- ## +m4_ifdef([_AM_PROG_CC_C_O], +[ +AM_INIT_AUTOMAKE([subdir-objects]) +],[ +AM_INIT_AUTOMAKE +])dnl +## ------------------------------------- ## +## End of automake initialization code ## +## ------------------------------------- ## +dnl +m4_define([$0], [])[]dnl +]) + + +dnl XC_AUTOMAKE +dnl ------------------------------------------------- +dnl Public macro. +dnl +dnl This macro embeds automake machinery into configure +dnl script with initialization option 'subdir-objects' +dnl when using automake version 1.14 or newer. + +AC_DEFUN([XC_AUTOMAKE], +[dnl +AC_PREREQ([2.50])dnl +dnl +AC_BEFORE([$0],[AM_INIT_AUTOMAKE])dnl +dnl +_XC_AUTOMAKE_BODY +dnl +m4_ifdef([AM_INIT_AUTOMAKE], + [m4_undefine([AM_INIT_AUTOMAKE])])dnl +dnl +m4_define([$0], [])[]dnl +]) + + +dnl _XC_AMEND_DISTCLEAN_BODY ([LIST-OF-SUBDIRS]) +dnl ------------------------------------------------- +dnl Private macro. +dnl +dnl This macro performs shell code embedding into +dnl configure script in order to modify distclean +dnl and maintainer-clean targets of makefiles which +dnl are located in given list of subdirs. + +m4_define([_XC_AMEND_DISTCLEAN_BODY], +[dnl +## ---------------------------------- ## +## Start of distclean amending code ## +## ---------------------------------- ## + +for xc_subdir in [$1] +do + +if test ! -f "$xc_subdir/Makefile"; then + echo "$xc_msg_err $xc_subdir/Makefile file not found. $xc_msg_abrt" >&2 + exit 1 +fi + +# Fetch dependency tracking file list from Makefile include lines. + +xc_inc_lines=`grep '^include .*(DEPDIR)' "$xc_subdir/Makefile" 2>/dev/null` +xc_cnt_words=`echo "$xc_inc_lines" | wc -w | tr -d "$xc_space$xc_tab"` + +# --disable-dependency-tracking might have been used, consequently +# there is nothing to amend without a dependency tracking file list. + +if test $xc_cnt_words -gt 0; then + +AC_MSG_NOTICE([amending $xc_subdir/Makefile]) + +# Build Makefile specific patch hunk. + +xc_p="$xc_subdir/xc_patch.tmp" + +xc_rm_depfiles=`echo "$xc_inc_lines" \ + | $SED 's%include% -rm -f%' 2>/dev/null` + +xc_dep_subdirs=`echo "$xc_inc_lines" \ + | $SED 's%include[[ ]][[ ]]*%%' 2>/dev/null \ + | $SED 's%(DEPDIR)/.*%(DEPDIR)%' 2>/dev/null \ + | sort | uniq` + +echo "$xc_rm_depfiles" >$xc_p + +for xc_dep_dir in $xc_dep_subdirs; do + echo " ${xc_tab}@xm_dep_cnt=\`ls $xc_dep_dir | wc -l 2>/dev/null\`; \\" >>$xc_p + echo " ${xc_tab}if test \$\$xm_dep_cnt -eq 0 && test -d $xc_dep_dir; then \\" >>$xc_p + echo " ${xc_tab} rm -rf $xc_dep_dir; \\" >>$xc_p + echo " ${xc_tab}fi" >>$xc_p +done + +# Build Makefile patching sed scripts. + +xc_s1="$xc_subdir/xc_script_1.tmp" +xc_s2="$xc_subdir/xc_script_2.tmp" +xc_s3="$xc_subdir/xc_script_3.tmp" + +cat >$xc_s1 <<\_EOT +/^distclean[[ ]]*:/,/^[[^ ]][[^ ]]*:/{ + s/^.*(DEPDIR)/___xc_depdir_line___/ +} +/^maintainer-clean[[ ]]*:/,/^[[^ ]][[^ ]]*:/{ + s/^.*(DEPDIR)/___xc_depdir_line___/ +} +_EOT + +cat >$xc_s2 <<\_EOT +/___xc_depdir_line___$/{ + N + /___xc_depdir_line___$/D +} +_EOT + +cat >$xc_s3 <<_EOT +/^___xc_depdir_line___/{ + r $xc_p + d +} +_EOT + +# Apply patch to Makefile and cleanup. + +$SED -f "$xc_s1" "$xc_subdir/Makefile" >"$xc_subdir/Makefile.tmp1" +$SED -f "$xc_s2" "$xc_subdir/Makefile.tmp1" >"$xc_subdir/Makefile.tmp2" +$SED -f "$xc_s3" "$xc_subdir/Makefile.tmp2" >"$xc_subdir/Makefile.tmp3" + +if test -f "$xc_subdir/Makefile.tmp3"; then + mv -f "$xc_subdir/Makefile.tmp3" "$xc_subdir/Makefile" +fi + +test -f "$xc_subdir/Makefile.tmp1" && rm -f "$xc_subdir/Makefile.tmp1" +test -f "$xc_subdir/Makefile.tmp2" && rm -f "$xc_subdir/Makefile.tmp2" +test -f "$xc_subdir/Makefile.tmp3" && rm -f "$xc_subdir/Makefile.tmp3" + +test -f "$xc_p" && rm -f "$xc_p" +test -f "$xc_s1" && rm -f "$xc_s1" +test -f "$xc_s2" && rm -f "$xc_s2" +test -f "$xc_s3" && rm -f "$xc_s3" + +fi + +done + +## -------------------------------- ## +## End of distclean amending code ## +## -------------------------------- ## +dnl +m4_define([$0], [])[]dnl +]) + + +dnl XC_AMEND_DISTCLEAN ([LIST-OF-SUBDIRS]) +dnl ------------------------------------------------- +dnl Public macro. +dnl +dnl This macro embeds shell code into configure script +dnl that amends, at configure runtime, the distclean +dnl target of Makefiles located in all subdirs given in +dnl the mandatory white-space separated list argument. +dnl +dnl Embedding only takes place when using automake 1.14 +dnl or newer, otherwise amending code is not included +dnl in generated configure script. +dnl +dnl distclean and maintainer-clean targets are modified +dnl to avoid unconditional removal of dependency subdirs +dnl which triggers distclean and maintainer-clean errors +dnl when using automake 'subdir-objects' option along +dnl with per-target objects. +dnl +dnl New behavior first removes each dependency tracking +dnl file independently, and only removes each dependency +dnl subdir when it finds out that it no longer holds any +dnl dependency tracking file. +dnl +dnl When configure option --disable-dependency-tracking +dnl is used no amending takes place given that there are +dnl no dependency tracking files. + +AC_DEFUN([XC_AMEND_DISTCLEAN], +[dnl +AC_PREREQ([2.50])dnl +dnl +m4_ifdef([_AC_OUTPUT_MAIN_LOOP], + [m4_provide_if([_AC_OUTPUT_MAIN_LOOP], [], + [m4_fatal([call to AC_OUTPUT needed before $0])])])dnl +dnl +m4_if([$#], [1], [], [m4_fatal([$0: wrong number of arguments])])dnl +m4_if([$1], [], [m4_fatal([$0: missing argument])])dnl +dnl +#AC_REQUIRE([XC_CONFIGURE_PREAMBLE])dnl +dnl +m4_ifdef([_AM_PROG_CC_C_O], +[ +_XC_AMEND_DISTCLEAN_BODY([$1]) +])dnl +m4_define([$0], [])[]dnl +]) + |