RFC: CMAKE - support out of tree builds

RFC: CMAKE - support out of tree builds

[Robert Schuster]

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Hi,
I am proposing the attached patch to make it possible to do out-of-tree
builds in OE. Out-of-tree builds should be preferred but I do not want
to look at every recipe if it still works.

OTOH I want to include llvm 2.5 with its new cmake-based build system
which incidentally does *not* permit in-tree builds.

Regards
Robert

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diff --git a/classes/cmake.bbclass b/classes/cmake.bbclass
index 8fd25cd..7907f94 100644
--- a/classes/cmake.bbclass
+++ b/classes/cmake.bbclass
@@ -3,13 +3,25 @@ DEPENDS += " cmake-native "
 # We want the staging and installing functions from autotools
 inherit autotools
 
+# Use in-tree builds by default but allow this to be changed
+# since some packages do not support them (e.g. llvm 2.5).
 OECMAKE_SOURCEPATH ?= "."
 
+# If declaring this, make sure you also set EXTRA_OEMAKE to
+# "-C ${OECMAKE_BUILDPATH}". So it will run the right makefiles.
+OECMAKE_BUILDPATH ?= ""
+
 cmake_do_configure() {
-     cmake ${OECMAKE_SOURCEPATH} \
-     -DCMAKE_INSTALL_PREFIX:PATH=${prefix} -Wno-dev \
-     -DCMAKE_FIND_ROOT_PATH=${STAGING_DIR_HOST} \
-     ${EXTRA_OECMAKE}
+  if [ ${OECMAKE_BUILDPATH} ]
+  then
+    mkdir ${OECMAKE_BUILDPATH}
+    cd ${OECMAKE_BUILDPATH}
+  fi
+
+  cmake ${OECMAKE_SOURCEPATH} \
+    -DCMAKE_INSTALL_PREFIX:PATH=${prefix} -Wno-dev \
+    -DCMAKE_FIND_ROOT_PATH=${STAGING_DIR_HOST} \
+    ${EXTRA_OECMAKE}
 }
 
 EXPORT_FUNCTIONS do_configure

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Re: RFC: CMAKE - support out of tree builds

[Robert Schuster]

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Hi,
I am going to push this 2009-03-20 aka tomorrow. Please speak if you do
not want it.

Regards
Robert

Robert Schuster schrieb:
> Hi,
> I am proposing the attached patch to make it possible to do out-of-tree
> builds in OE. Out-of-tree builds should be preferred but I do not want
> to look at every recipe if it still works.
> 
> OTOH I want to include llvm 2.5 with its new cmake-based build system
> which incidentally does *not* permit in-tree builds.
> 
> Regards
> Robert
> 
> 
> ------------------------------------------------------------------------
> 
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> Openembedded-devel mailing list
> Openembedded-devel@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel



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