Commit 8cce271e authored by Glenn Morris's avatar Glenn Morris
Browse files

Add some comments related to how epaths.h gets built.

parent bc8d33d5
......@@ -279,6 +279,9 @@ all: ${SUBDIR} leim
removenullpaths=sed -e 's/^://g' -e 's/:$$//g' -e 's/::/:/g'
# Generate epaths.h from epaths.in. This target is invoked by `configure'.
# See comments in configure.in for why it is done this way, as opposed
# to just letting configure generate epaths.h from epaths.in in a
# similar way to how Makefile is made from Makefile.in.
epaths-force: FRC
@(lisppath=`echo ${lisppath} | ${removenullpaths}` ; \
buildlisppath=`echo ${buildlisppath} | ${removenullpaths}` ; \
......
......@@ -32,6 +32,10 @@ dnl Support for --program-prefix, --program-suffix and
dnl --program-transform-name options
AC_ARG_PROGRAM
dnl It is important that variables on the RHS not be expanded here,
dnl hence the single quotes. This is per the GNU coding standards, see
dnl (autoconf) Installation Directory Variables
dnl See also epaths.h below.
lispdir='${datadir}/emacs/${version}/lisp'
locallisppath='${datadir}/emacs/${version}/site-lisp:'\
'${datadir}/emacs/site-lisp'
......@@ -3750,6 +3754,14 @@ fi
test "${exec_prefix}" != NONE &&
exec_prefix=`echo "${exec_prefix}" | sed 's,\([^/]\)/*$,\1,'`]
dnl You might wonder (I did) why epaths.h is generated by running make,
dnl rather than just letting configure generate it from epaths.in.
dnl One reason is that the various paths are not fully expanded (see above);
dnl eg gamedir=${prefix}/var/games/emacs.
dnl Secondly, the GNU Coding standards require that one should be able
dnl to run `make prefix=/some/where/else' and override the values set
dnl by configure. This also explains the `move-if-change' test and
dnl the use of force in the `epaths-force' rule in Makefile.in.
AC_OUTPUT(Makefile lib-src/Makefile oldXMenu/Makefile \
doc/emacs/Makefile doc/misc/Makefile doc/lispintro/Makefile \
doc/lispref/Makefile src/Makefile \
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment