build: Pass extra cmake flags

Add ability to provide extra cmake flags when building library
and when creating RPMs or DEBs using EXTRA_CMAKE_FLAGS.

Set an environment variable prior execution to provide
this information to build scripts:
export EXTRA_CMAKE_FLAGS="<flags>"

Cc: Benjamin Drung <benjamin.drung@profitbricks.com>
Cc: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.de>
Signed-off-by: Alaa Hleihel <alaa@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

build.sh

@@ -23,9 +23,9 @@ fi
 cd "$BUILDDIR"
 
 if [ "x$NINJA" == "x" ]; then
-    $CMAKE -DIN_PLACE=1 ..
+    $CMAKE -DIN_PLACE=1 ${EXTRA_CMAKE_FLAGS:-} ..
     make
 else
-    $CMAKE -DIN_PLACE=1 -GNinja ..
+    $CMAKE -DIN_PLACE=1 -GNinja ${EXTRA_CMAKE_FLAGS:-} ..
     $NINJA
 fi

debian/rules

@@ -32,7 +32,8 @@ override_dh_auto_configure:
 			-DCMAKE_INSTALL_LIBEXECDIR:PATH=/usr/lib \
 			-DCMAKE_INSTALL_SHAREDSTATEDIR:PATH=/var/lib \
 			-DCMAKE_INSTALL_RUNDIR:PATH=/run \
-			-DCMAKE_INSTALL_UDEV_RULESDIR:PATH=/lib/udev/rules.d
+			-DCMAKE_INSTALL_UDEV_RULESDIR:PATH=/lib/udev/rules.d \
+			$(EXTRA_CMAKE_FLAGS)
 
 override_dh_auto_build:
 	ninja -C build-deb -v

redhat/rdma-core.spec

@@ -205,6 +205,8 @@ discover and use SCSI devices via the SCSI RDMA Protocol over InfiniBand.
 %define _rundir /var/run
 %endif
 
+%{!?EXTRA_CMAKE_FLAGS: %define EXTRA_CMAKE_FLAGS %{nil}}
+
 # Pass all of the rpm paths directly to GNUInstallDirs and our other defines.
 %cmake %{CMAKE_FLAGS} \
          -DCMAKE_BUILD_TYPE=Release \
@@ -222,7 +224,8 @@ discover and use SCSI devices via the SCSI RDMA Protocol over InfiniBand.
          -DCMAKE_INSTALL_INITDDIR:PATH=%{_initrddir} \
          -DCMAKE_INSTALL_RUNDIR:PATH=%{_rundir} \
          -DCMAKE_INSTALL_DOCDIR:PATH=%{_docdir}/%{name}-%{version} \
-         -DCMAKE_INSTALL_UDEV_RULESDIR:PATH=%{_udevrulesdir}
+         -DCMAKE_INSTALL_UDEV_RULESDIR:PATH=%{_udevrulesdir} \
+         %{EXTRA_CMAKE_FLAGS}
 %make_jobs
 
 %install

suse/rdma-core.spec

@@ -319,6 +319,8 @@ on those changes.
 %define _rundir /var/run
 %endif
 
+%{!?EXTRA_CMAKE_FLAGS: %define EXTRA_CMAKE_FLAGS %{nil}}
+
 # Pass all of the rpm paths directly to GNUInstallDirs and our other defines.
 %cmake %{CMAKE_FLAGS} \
 	 -DCMAKE_MODULE_LINKER_FLAGS="-Wl,--as-needed -Wl,-z,now" \
@@ -338,7 +340,8 @@ on those changes.
          -DCMAKE_INSTALL_INITDDIR:PATH=%{_initddir} \
          -DCMAKE_INSTALL_RUNDIR:PATH=%{_rundir} \
          -DCMAKE_INSTALL_DOCDIR:PATH=%{_docdir}/%{name}-%{version} \
-         -DCMAKE_INSTALL_UDEV_RULESDIR:PATH=%{_udevrulesdir}
+         -DCMAKE_INSTALL_UDEV_RULESDIR:PATH=%{_udevrulesdir} \
+         %{EXTRA_CMAKE_FLAGS}
 %make_jobs
 
 %install