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build: Save configure options and re-use them for automatic runs of configure

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This supports the case of a user running "configure --prefix=/foo" then later
updating the soruce (including the configure script) and re-running make.

In this case, the make invocation will re-run configure. Before this change,
this run of configure would lose the user's carefully chosen prefix. This
is now fixed so that configrue is re-run with the user's options.
This commit is contained in:
Carl Worth 2011-03-10 11:30:06 -08:00
parent c430265612
commit 2d6718b837
2 changed files with 8 additions and 1 deletions
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4
Makefile
View file

@ -25,13 +25,15 @@ srcdir ?= .
include Makefile.config include Makefile.config
Makefile.config: $(srcdir)/configure Makefile.config: $(srcdir)/configure
ifeq ($(configure_options),)
@echo "" @echo ""
@echo "Note: Calling ./configure with no command-line arguments. This is often fine," @echo "Note: Calling ./configure with no command-line arguments. This is often fine,"
@echo " but if you want to specify any arguments (such as an alternate prefix" @echo " but if you want to specify any arguments (such as an alternate prefix"
@echo " into which to install), call ./configure explicitly and then make again." @echo " into which to install), call ./configure explicitly and then make again."
@echo " See \"./configure --help\" for more details." @echo " See \"./configure --help\" for more details."
@echo "" @echo ""
./configure endif
$(srcdir)/configure $(configure_options)
# Finally, include all of the Makefile.local fragments where all the # Finally, include all of the Makefile.local fragments where all the
# real work is done. # real work is done.

5
configure vendored
View file

@ -529,8 +529,13 @@ cat > Makefile.config <<EOF
# changes, (and this could happen by simply calling "make" if the # changes, (and this could happen by simply calling "make" if the
# configure script is updated). # configure script is updated).
# The top-level directory for the source, (the directory containing
# the configure script). This may be different than the build
# directory (the current directory at the time configure was run).
srcdir = ${srcdir} srcdir = ${srcdir}
configure_options = $@
# We use vpath directives (rather than the VPATH variable) since the # We use vpath directives (rather than the VPATH variable) since the
# VPATH variable matches targets as well as prerequisites, (which is # VPATH variable matches targets as well as prerequisites, (which is
# not useful since then a target left-over from a srcdir build would # not useful since then a target left-over from a srcdir build would