253 lines
7.4 KiB
Plaintext
253 lines
7.4 KiB
Plaintext
#---------------------------------------------------------------------------
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#
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# xc-am-iface.m4
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#
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# Copyright (c) 2013 - 2020 Daniel Stenberg <daniel@haxx.se>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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#---------------------------------------------------------------------------
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# serial 1
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dnl _XC_AUTOMAKE_BODY
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dnl -------------------------------------------------
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dnl Private macro.
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dnl
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dnl This macro performs embedding of automake initialization
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dnl code into configure script. When automake version 1.14 or
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dnl newer is used at configure script generation time, this
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dnl results in 'subdir-objects' automake option being used.
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dnl When using automake versions older than 1.14 this option
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dnl is not used when generating configure script.
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dnl
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dnl Existence of automake _AM_PROG_CC_C_O m4 private macro
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dnl is used to differentiate automake version 1.14 from older
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dnl ones which lack this macro.
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m4_define([_XC_AUTOMAKE_BODY],
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[dnl
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## --------------------------------------- ##
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## Start of automake initialization code ##
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## --------------------------------------- ##
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m4_ifdef([_AM_PROG_CC_C_O],
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[
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AM_INIT_AUTOMAKE([subdir-objects])
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],[
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AM_INIT_AUTOMAKE
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])dnl
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## ------------------------------------- ##
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## End of automake initialization code ##
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## ------------------------------------- ##
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dnl
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m4_define([$0], [])[]dnl
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])
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dnl XC_AUTOMAKE
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dnl -------------------------------------------------
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dnl Public macro.
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dnl
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dnl This macro embeds automake machinery into configure
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dnl script regardless of automake version used in order
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dnl to generate configure script.
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dnl
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dnl When using automake version 1.14 or newer, automake
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dnl initialization option 'subdir-objects' is used to
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dnl generate the configure script, otherwise this option
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dnl is not used.
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AC_DEFUN([XC_AUTOMAKE],
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[dnl
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AC_PREREQ([2.50])dnl
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dnl
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AC_BEFORE([$0],[AM_INIT_AUTOMAKE])dnl
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dnl
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_XC_AUTOMAKE_BODY
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dnl
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m4_ifdef([AM_INIT_AUTOMAKE],
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[m4_undefine([AM_INIT_AUTOMAKE])])dnl
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dnl
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m4_define([$0], [])[]dnl
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])
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dnl _XC_AMEND_DISTCLEAN_BODY ([LIST-OF-SUBDIRS])
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dnl -------------------------------------------------
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dnl Private macro.
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dnl
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dnl This macro performs shell code embedding into
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dnl configure script in order to modify distclean
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dnl and maintainer-clean targets of makefiles which
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dnl are located in given list of subdirs.
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dnl
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dnl See XC_AMEND_DISTCLEAN comments for details.
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m4_define([_XC_AMEND_DISTCLEAN_BODY],
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[dnl
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## ---------------------------------- ##
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## Start of distclean amending code ##
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## ---------------------------------- ##
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for xc_subdir in [$1]
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do
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if test ! -f "$xc_subdir/Makefile"; then
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echo "$xc_msg_err $xc_subdir/Makefile file not found. $xc_msg_abrt" >&2
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exit 1
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fi
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# Fetch dependency tracking file list from Makefile include lines.
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xc_inc_lines=`grep '^include .*(DEPDIR)' "$xc_subdir/Makefile" 2>/dev/null`
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xc_cnt_words=`echo "$xc_inc_lines" | wc -w | tr -d "$xc_space$xc_tab"`
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# --disable-dependency-tracking might have been used, consequently
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# there is nothing to amend without a dependency tracking file list.
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if test $xc_cnt_words -gt 0; then
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AC_MSG_NOTICE([amending $xc_subdir/Makefile])
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# Build Makefile specific patch hunk.
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xc_p="$xc_subdir/xc_patch.tmp"
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xc_rm_depfiles=`echo "$xc_inc_lines" \
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| $SED 's%include% -rm -f%' 2>/dev/null`
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xc_dep_subdirs=`echo "$xc_inc_lines" \
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| $SED 's%include[[ ]][[ ]]*%%' 2>/dev/null \
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| $SED 's%(DEPDIR)/.*%(DEPDIR)%' 2>/dev/null \
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| sort | uniq`
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echo "$xc_rm_depfiles" >$xc_p
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for xc_dep_dir in $xc_dep_subdirs; do
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echo "${xc_tab}@xm_dep_cnt=\`ls $xc_dep_dir | wc -l 2>/dev/null\`; \\" >>$xc_p
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echo "${xc_tab}if test \$\$xm_dep_cnt -eq 0 && test -d $xc_dep_dir; then \\" >>$xc_p
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echo "${xc_tab} rm -rf $xc_dep_dir; \\" >>$xc_p
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echo "${xc_tab}fi" >>$xc_p
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done
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# Build Makefile patching sed scripts.
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xc_s1="$xc_subdir/xc_script_1.tmp"
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xc_s2="$xc_subdir/xc_script_2.tmp"
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xc_s3="$xc_subdir/xc_script_3.tmp"
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cat >$xc_s1 <<\_EOT
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/^distclean[[ ]]*:/,/^[[^ ]][[^ ]]*:/{
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s/^.*(DEPDIR)/___xc_depdir_line___/
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}
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/^maintainer-clean[[ ]]*:/,/^[[^ ]][[^ ]]*:/{
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s/^.*(DEPDIR)/___xc_depdir_line___/
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}
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_EOT
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cat >$xc_s2 <<\_EOT
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/___xc_depdir_line___$/{
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N
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/___xc_depdir_line___$/D
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}
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_EOT
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cat >$xc_s3 <<_EOT
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/^___xc_depdir_line___/{
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r $xc_p
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d
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}
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_EOT
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# Apply patch to Makefile and cleanup.
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$SED -f "$xc_s1" "$xc_subdir/Makefile" >"$xc_subdir/Makefile.tmp1"
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$SED -f "$xc_s2" "$xc_subdir/Makefile.tmp1" >"$xc_subdir/Makefile.tmp2"
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$SED -f "$xc_s3" "$xc_subdir/Makefile.tmp2" >"$xc_subdir/Makefile.tmp3"
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if test -f "$xc_subdir/Makefile.tmp3"; then
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mv -f "$xc_subdir/Makefile.tmp3" "$xc_subdir/Makefile"
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fi
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test -f "$xc_subdir/Makefile.tmp1" && rm -f "$xc_subdir/Makefile.tmp1"
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test -f "$xc_subdir/Makefile.tmp2" && rm -f "$xc_subdir/Makefile.tmp2"
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test -f "$xc_subdir/Makefile.tmp3" && rm -f "$xc_subdir/Makefile.tmp3"
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test -f "$xc_p" && rm -f "$xc_p"
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test -f "$xc_s1" && rm -f "$xc_s1"
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test -f "$xc_s2" && rm -f "$xc_s2"
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test -f "$xc_s3" && rm -f "$xc_s3"
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fi
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done
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## -------------------------------- ##
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## End of distclean amending code ##
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## -------------------------------- ##
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dnl
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m4_define([$0], [])[]dnl
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])
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dnl XC_AMEND_DISTCLEAN ([LIST-OF-SUBDIRS])
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dnl -------------------------------------------------
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dnl Public macro.
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dnl
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dnl This macro embeds shell code into configure script
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dnl that amends, at configure runtime, the distclean
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dnl and maintainer-clean targets of Makefiles located
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dnl in all subdirs given in the mandatory white-space
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dnl separated list argument.
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dnl
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dnl Embedding only takes place when using automake 1.14
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dnl or newer, otherwise amending code is not included
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dnl in generated configure script.
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dnl
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dnl distclean and maintainer-clean targets are modified
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dnl to avoid unconditional removal of dependency subdirs
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dnl which triggers distclean and maintainer-clean errors
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dnl when using automake 'subdir-objects' option along
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dnl with per-target objects and source files existing in
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dnl multiple subdirs used for different build targets.
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dnl
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dnl New behavior first removes each dependency tracking
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dnl file independently, and only removes each dependency
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dnl subdir when it finds out that it no longer holds any
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dnl dependency tracking file.
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dnl
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dnl When configure option --disable-dependency-tracking
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dnl is used no amending takes place given that there are
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dnl no dependency tracking files.
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AC_DEFUN([XC_AMEND_DISTCLEAN],
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[dnl
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AC_PREREQ([2.50])dnl
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dnl
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m4_ifdef([_AC_OUTPUT_MAIN_LOOP],
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[m4_provide_if([_AC_OUTPUT_MAIN_LOOP], [],
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[m4_fatal([call to AC_OUTPUT needed before $0])])])dnl
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dnl
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m4_if([$#], [1], [], [m4_fatal([$0: wrong number of arguments])])dnl
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m4_if([$1], [], [m4_fatal([$0: missing argument])])dnl
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dnl
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AC_REQUIRE([XC_CONFIGURE_PREAMBLE])dnl
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dnl
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m4_ifdef([_AM_PROG_CC_C_O],
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[
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_XC_AMEND_DISTCLEAN_BODY([$1])
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])dnl
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m4_define([$0], [])[]dnl
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])
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