[Buildroot] [PATCH v3 1/4] pkg-cmake: allow to build package in a subdirectory

Gwenhael Goavec-Merou gwenj at trabucayre.com
Wed Mar 4 16:00:08 UTC 2015


From: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>

For some cmake based packages, like GNURadio, it's forbidden to do the
compilation directly in the sources directory. This patch add a new 
variable to specify, if needed, the name of a sub-directory used to compile.

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
---
Changes v2 -> v3:
 * Update docs to add detail about LIBFOO_BUILDDIR
Changes v1 -> v2:
 * Allow to overload $(2)_BUILDDIR instead of adding a new variable and test
---
 docs/manual/adding-packages-cmake.txt | 7 ++++++-
 package/pkg-cmake.mk                  | 8 +++++---
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/docs/manual/adding-packages-cmake.txt b/docs/manual/adding-packages-cmake.txt
index d92b209..05738f0 100644
--- a/docs/manual/adding-packages-cmake.txt
+++ b/docs/manual/adding-packages-cmake.txt
@@ -79,7 +79,7 @@ First, all the package metadata information variables that exist in
 the generic infrastructure also exist in the CMake infrastructure:
 +LIBFOO_VERSION+, +LIBFOO_SOURCE+, +LIBFOO_PATCH+, +LIBFOO_SITE+,
 +LIBFOO_SUBDIR+, +LIBFOO_DEPENDENCIES+, +LIBFOO_INSTALL_STAGING+,
-+LIBFOO_INSTALL_TARGET+.
++LIBFOO_INSTALL_TARGET+, +LIBFOO_BUILDDIR+.
 
 A few additional variables, specific to the CMake infrastructure, can
 also be defined. Many of them are only useful in very specific cases,
@@ -91,6 +91,11 @@ typical packages will therefore only use a few of them.
   the tree extracted by the tarball. If +HOST_LIBFOO_SUBDIR+ is not
   specified, it defaults to +LIBFOO_SUBDIR+.
 
+* +LIBFOO_BUILDDIR+ may overload the default build directory when a
+  package prevents from in-source-tree build. For example,
+  FOO_BUILDDIR = $(FOO_SRCDIR)/.build, will be used to compile foo
+  package in .build subdirectory.
+
 * +LIBFOO_CONF_ENV+, to specify additional environment variables to
   pass to CMake. By default, empty.
 
diff --git a/package/pkg-cmake.mk b/package/pkg-cmake.mk
index 2404c40..c50039d 100644
--- a/package/pkg-cmake.mk
+++ b/package/pkg-cmake.mk
@@ -61,7 +61,7 @@ $(2)_INSTALL_STAGING_OPTS	?= DESTDIR=$$(STAGING_DIR) install
 $(2)_INSTALL_TARGET_OPTS		?= DESTDIR=$$(TARGET_DIR) install
 
 $(2)_SRCDIR			= $$($(2)_DIR)/$$($(2)_SUBDIR)
-$(2)_BUILDDIR			= $$($(2)_SRCDIR)
+$(2)_BUILDDIR			?= $$($(2)_SRCDIR)
 
 #
 # Configure step. Only define it if not already defined by the package
@@ -73,7 +73,8 @@ ifeq ($(4),target)
 
 # Configure package for target
 define $(2)_CONFIGURE_CMDS
-	(cd $$($$(PKG)_BUILDDIR) && \
+	(mkdir -p $$($$(PKG)_BUILDDIR) && \
+	cd $$($$(PKG)_BUILDDIR) && \
 	rm -f CMakeCache.txt && \
 	PATH=$$(BR_PATH) \
 	$$($$(PKG)_CONF_ENV) $$(HOST_DIR)/usr/bin/cmake $$($$(PKG)_SRCDIR) \
@@ -98,7 +99,8 @@ else
 
 # Configure package for host
 define $(2)_CONFIGURE_CMDS
-	(cd $$($$(PKG)_BUILDDIR) && \
+	(mkdir -p $$($$(PKG)_BUILDDIR) && \
+	cd $$($$(PKG)_BUILDDIR) && \
 	rm -f CMakeCache.txt && \
 	PATH=$$(BR_PATH) \
 	$$(HOST_DIR)/usr/bin/cmake $$($$(PKG)_SRCDIR) \
-- 
2.0.5



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