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Code Issues Releases Wiki Activity

xc-am-iface.m4: comments refinement

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This commit is contained in:
Yang Tse 2013-07-18 16:03:15 +02:00
parent 26b0cb6ae2
commit dd17069c9e
1 changed files with 19 additions and 6 deletions
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25
m4/xc-am-iface.m4
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@ -31,6 +31,10 @@ 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.
dnl
dnl Existence of automake _AM_PROG_CC_C_O m4 private macro
dnl is used to differentiate automake version 1.14 from older
dnl ones which lack this macro.
m4_define([_XC_AUTOMAKE_BODY],
[dnl
@ -56,8 +60,13 @@ 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.
dnl script regardless of automake version used in order
dnl to generate configure script.
dnl
dnl When using automake version 1.14 or newer, automake
dnl initialization option 'subdir-objects' is used to
dnl generate the configure script, otherwise this option
dnl is not used.
AC_DEFUN([XC_AUTOMAKE],
[dnl
@ -82,6 +91,8 @@ 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.
dnl
dnl See XC_AMEND_DISTCLEAN comments for details.
m4_define([_XC_AMEND_DISTCLEAN_BODY],
[dnl
@ -124,7 +135,7 @@ xc_dep_subdirs=`echo "$xc_inc_lines" \
echo "$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}@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
@ -196,8 +207,9 @@ 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 and maintainer-clean targets of Makefiles located
dnl in all subdirs given in the mandatory white-space
dnl separated list argument.
dnl
dnl Embedding only takes place when using automake 1.14
dnl or newer, otherwise amending code is not included
@ -207,7 +219,8 @@ 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 with per-target objects and source files existing in
dnl multiple subdirs used for different build targets.
dnl
dnl New behavior first removes each dependency tracking
dnl file independently, and only removes each dependency