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-rw-r--r--src/CMakeLists.txt13
-rw-r--r--src/cmake/library.cmake9
-rw-r--r--src/vppinfra/CMakeLists.txt1
3 files changed, 21 insertions, 2 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0d971fd8ebc..6fc243ca4d2 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -11,13 +11,14 @@
# See the License for the specific language governing permissions and
# limitations under the License.
-cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.10)
set(CMAKE_C_COMPILER_NAMES clang-11 clang-10 clang-9 gcc-10 gcc-9 cc)
project(vpp C)
include(CheckCCompilerFlag)
+include(CheckIPOSupported)
include(cmake/misc.cmake)
include(cmake/cpu.cmake)
include(cmake/ccache.cmake)
@@ -106,6 +107,16 @@ set_property(CACHE CMAKE_BUILD_TYPE PROPERTY
HELPSTRING "Build type - valid options are: ${BUILD_TYPES}")
##############################################################################
+# link time optimizations
+##############################################################################
+if (CMAKE_BUILD_TYPE_UC STREQUAL "RELEASE")
+ check_ipo_supported(RESULT _result)
+ if (_result)
+ option(VPP_USE_LTO "Link time optimization of release binaries" ON)
+ endif()
+endif()
+
+##############################################################################
# sanitizers
##############################################################################
diff --git a/src/cmake/library.cmake b/src/cmake/library.cmake
index 06248a57aa3..a5b6c76d2d1 100644
--- a/src/cmake/library.cmake
+++ b/src/cmake/library.cmake
@@ -13,7 +13,7 @@
macro(add_vpp_library lib)
cmake_parse_arguments(ARG
- ""
+ "LTO"
"COMPONENT"
"SOURCES;MULTIARCH_SOURCES;API_FILES;LINK_LIBRARIES;INSTALL_HEADERS;DEPENDS"
${ARGN}
@@ -38,6 +38,13 @@ macro(add_vpp_library lib)
COMPONENT ${ARG_COMPONENT}
)
+ if (ARG_LTO AND VPP_USE_LTO)
+ set_property(TARGET ${lib} PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
+ target_compile_options (${lib} PRIVATE "-ffunction-sections")
+ target_compile_options (${lib} PRIVATE "-fdata-sections")
+ target_link_libraries (${lib} "-Wl,--gc-sections")
+ endif()
+
if(ARG_MULTIARCH_SOURCES)
vpp_library_set_multiarch_sources(${lib} "${ARG_DEPENDS}" ${ARG_MULTIARCH_SOURCES})
endif()
diff --git a/src/vppinfra/CMakeLists.txt b/src/vppinfra/CMakeLists.txt
index e0ae662e4ba..a670181732e 100644
--- a/src/vppinfra/CMakeLists.txt
+++ b/src/vppinfra/CMakeLists.txt
@@ -198,6 +198,7 @@ add_vpp_library(vppinfra
LINK_LIBRARIES m
INSTALL_HEADERS ${VPPINFRA_HEADERS}
COMPONENT libvppinfra
+ LTO
)
##############################################################################