Re: [ptxdist] [PATCH] Add missing install CROSS_LIB_DIR for CMAKE environments.

[Denis Osterland-Heim <denis.osterland@diehl.com>]

Hi,

I have encountered an problem with this patch in cmake based users of sdbus-cpp package.
This are the difference of installed cmake file after the patch:
--- a/sysroot-target/usr/lib/cmake/sdbus-c++/sdbus-c++-targets.cmake
+++ b/sysroot-target/usr/lib/cmake/sdbus-c++/sdbus-c++-targets.cmake
@@ -41,23 +41,8 @@
 unset(_expectedTargets)


-# Compute the installation prefix relative to this file.
-get_filename_component(_IMPORT_PREFIX "${CMAKE_CURRENT_LIST_FILE}" PATH)
-# Use original install
prefix when loaded through a
-# cross-prefix symbolic link such as /lib -> /usr/lib.
-get_filename_component(_realCurr "${_IMPORT_PREFIX}" REALPATH)
-get_filename_component(_realOrig
"/usr/lib/cmake/sdbus-c++" REALPATH)
-if(_realCurr STREQUAL _realOrig)
-  set(_IMPORT_PREFIX "/usr/lib/cmake/sdbus-c++")
-endif()
-unset(_realOrig)
-unset(_realCurr)
-get_filename_component(_IMPORT_PREFIX
"${_IMPORT_PREFIX}" PATH)
-get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
-get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
-if(_IMPORT_PREFIX STREQUAL "/")
-  set(_IMPORT_
PREFIX "")
-endif()
+# The installation prefix configured by this project.
+set(_IMPORT_PREFIX "/usr")

 # Create imported target SDBusCpp::sdbus-c++
 add_library(SDBusCpp::sdbus-c++ SHARED IMPORTED)


This causes following error:
CMake Error at x/sysroot-target/usr/lib/cmake/sdbus-c++/sdbus-c++-targets.cmake:83 (message):
  The imported target "SDBusCpp::sdbus-c++" references the file

     "/usr/lib/libsdbus-c++.so.0.8.2"

  but this file does not exist.  Possible reasons include:

  * The file was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and contained

     "x/sysroot-target/usr/lib/cmake/sdbus-c++/sdbus-c++-targets.cmake"

  but not all the files it references.
It looks like an effect mentioned in https://cmake.org/pipermail/cmake/2012-February/049250.html
and works with the initial relative version.

Unfortunately it looks like none of both variants is unconditionally right.
I am not sure how to handle this this properly, but I know that this is ugly:
--- a/rules/sdbus-cpp.make
+++ b/rules/sdbus-cpp.make
@@ -29,7 +29,8 @@

 SDBUS_CPP_CONF_TOOL:= cmake
 SDBUS_CPP_CONF_OPT:= \
-$(CROSS_CMAKE_USR) \
+$(filter-out -DCMAKE_INSTALL_LIBDIR=/usr/$(CROSS_LIB_DIR), $(CROSS_CMAKE_USR)) \
+-DCMAKE_INSTALL_LIBDIR=$(CROSS_LIB_DIR) \
 -DBUILD_TESTS=OFF \
 -DBUILD_CODE_GEN=OFF \
 -DBUILD_DOC=OFF

Regards, Denis

Am Freitag, den 21.05.2021, 13:03 +0200 schrieb Christian Melki:
> On 5/21/21 12:52 PM, Christian Melki wrote:
> > On 5/21/21 12:40 PM, Michael Olbrich wrote:
> > > On Tue, May 18, 2021 at 03:34:01PM +0200, Christian Melki wrote:
> > > > Was installing libraries into wrong directories.
> > > >
> > > > Signed-off-by: Christian Melki <christian.melki@t2data.com>
> > > > ---
> > > >   rules/pre/Rules.make | 1 +
> > > >   1 file changed, 1 insertion(+)
> > > >
> > > > diff --git a/rules/pre/Rules.make b/rules/pre/Rules.make
> > > > index 99e459ce2..93645a42a 100644
> > > > --- a/rules/pre/Rules.make
> > > > +++ b/rules/pre/Rules.make
> > > > @@ -233,6 +233,7 @@ CROSS_AUTOCONF_ROOT :=
> > > > $(CROSS_AUTOCONF_SYSROOT_ROOT) $(CROSS_AUTOCONF_ARCH)
> > > >   CROSS_CMAKE_USR     := \
> > > >       -DCMAKE_INSTALL_PREFIX=/usr \
> > > > +    -DCMAKE_INSTALL_LIBDIR=$(CROSS_LIB_DIR) \
> > >
> > > Hmmm, I need -DCMAKE_INSTALL_LIBDIR=/usr/$(CROSS_LIB_DIR) here.
> > >
> > > Otherwise the dir is taken as relative to the package build dir, at least
> > > for libjpeg.
> > >
> > > Michael
> > >
> >
> > Hm. Jury's out on that one.
> > I looked it over before I added it and I think it should be relative?
> >
> > https://bugzilla.redhat.com/show_bug.cgi?id=795542
> > https://gitlab.kitware.com/cmake/cmake/-/commit/126c993d031f6f7be4970a67621da92f580d4e5a
> >
> >
> > Seems spec confusion has caused both variants to exist in the wild?
> > But it was changed a long time ago to relative...
> >
> > Christian
> >
>
> Looking closer...
> Maybe the only way to get this right is to specify the absolute path.
> I'm happy with that.
>
> > > >       -DCMAKE_INSTALL_SYSCONFDIR=/etc \
> > > >       -DCMAKE_BUILD_TYPE:STRING=RelWithDebInfo \
> > > >       -DCMAKE_TOOLCHAIN_FILE='${PTXDIST_CMAKE_TOOLCHAIN_TARGET}'
> > > > --
> > > > 2.31.1
> > > >
> > > >
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