07-20-2010
Makefile executing another Makefile first?
I have 2 libraries in 2 different directories that I build with Makefiles.
library B depends on library A. If I modify a .cpp file in library A and run lib B's Makefile can I have B's makefile to automatically rebuild library A?
I am now rebuilding A, followed by B... but I'd like B to rebuild A automatically if it needs rebuilding. This is a streamlined example, but my real situation is
more complicated. I'd like the makefile for the final application to cause all
dependent libraries to build, if necessary so that I don't have to manually build them in the correct order.
I've tried "include ../A/Makefile" in B's Makefile, but I get errors. I think its because the directory doesn't change to ../A
Makefile:81: warning: overriding commands for target `all'
../A/Makefile:78: warning: ignoring old commands for target `all'
Makefile:98: warning: overriding commands for target `clean'
../A/Makefile:99: warning: ignoring old commands for target `clean'
make: *** No rule to make target `tinystr.o', needed by `A.a'. Stop.
Does anyone know how to make this work?
William
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LEARN ABOUT CENTOS
create_makefiles
CREATE_MAKEFILES() CREATE_MAKEFILES()
NAME
create_makefiles - Recreates all Makefiles beneath a directory
SYNOPSIS
create_makefiles [dir]
DESCRIPTION
create_makefiles recreates all Makefiles in dir and its (recursed) subdirectories from the corresponding Makefile.am templates.
This script must be run from the toplevel directory (the one containing configure). This script saves time compared to re-running configure
completely.
If the source directory is different from the build directory (see the environment variables below), it will be assumed that each
Makefile.am and Makefile.in belongs beneath the source directory and that each Makefile belongs beneath the build directory.
This utility is part of the KDE Software Development Kit.
ENVIRONMENT
One of the following variables (but not both) should be set if the source directory is different from the build directory. If the build
directory is simply a subdirectory of the source directory, the simpler variable OBJ_SUBDIR should be used.
OBJ_SUBJDIR
Indicates that the build directory is in the given subdirectory of the source directory. For instance, if the source directory is
kdesdk and the build directory is kdesdk/obj-i386-linux, then OBJ_SUBDIR should be set to obj-i386-linux.
OBJ_REPLACEMENT
A sed expression that is used to transform the source directory into the build directory. For instance, if the source directory is
kdesdk/obj-i386-linux, then OBJ_REPLACEMENT should be set to s#kdesdk#kdesdk-obj#.
SEE ALSO
create_makefile(1) make(2)
AUTHORS
create_makefiles was written by David Faure<faure@kde.org>.
This manual page was prepared by Ben Burton<bab@debian.org> for the Debian GNU/Linux system (but may be used by others).
CREATE_MAKEFILES()