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Target specific optimization control.

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This allows one to set a semi-colon separated list of regular
expressions in the environment variable PX4_NO_OPTIMIZATION
to control which (cmake generated) targets should be compiled
without optimization.

Suppressing optimization can be necessary for debugging in
a debugger, especially when trying to step through the code
or needing to print variables that otherwise are optimized out.

EXAMPLE

export PX4_NO_OPTIMIZATION="px4;^modules__uORB;^modules__systemlib$"

will result in the following messages during cmake configuration:

[...]
-- Disabling optimization for target 'platforms__posix__px4_layer'
because it matches the regexp 'px4' in env var PX4_NO_OPTIMIZATION
-- Disabling optimization for target 'modules__systemlib' because it
matches the regexp '^modules__systemlib$' in env var PX4_NO_OPTIMIZATION
-- Disabling optimization for target 'modules__uORB' because it matches
the regexp '^modules__uORB' in env var PX4_NO_OPTIMIZATION
-- Disabling optimization for target 'examples__px4_simple_app' because
it matches the regexp 'px4' in env var PX4_NO_OPTIMIZATION
-- Disabling optimization for target 'modules__uORB__uORB_tests' because
it matches the regexp '^modules__uORB' in env var PX4_NO_OPTIMIZATION
-- Disabling optimization for target 'px4' because it matches the regexp
'px4' in env var PX4_NO_OPTIMIZATION

Note that a list of all (currently used) target names can be printed
with the following command line from within the required build directory:

find . -wholename '*/CMakeFiles/*.dir/flags.make' | xargs dirname | xargs basename -a | sort -u | sed -e 's/.dir$//'
This commit is contained in:
Carlo Wood
2016-09-13 16:31:08 +02:00
committed by Beat Küng
parent 541c8a06ca
commit 77d356d275
7 changed files with 108 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmake/nuttx/px4_impl_nuttx.cmake
+5 -1
View File
@@ -371,6 +371,7 @@ endfunction()
# px4_os_add_flags(
# C_FLAGS <inout-variable>
# CXX_FLAGS <inout-variable>
# OPTIMIZATION_FLAGS <inout-variable>
# EXE_LINKER_FLAGS <inout-variable>
# INCLUDE_DIRS <inout-variable>
# LINK_DIRS <inout-variable>
@@ -382,6 +383,7 @@ endfunction()
# Input/Output: (appends to existing variable)
# C_FLAGS : c compile flags variable
# CXX_FLAGS : c++ compile flags variable
# OPTIMIZATION_FLAGS : optimization compile flags variable
# EXE_LINKER_FLAGS : executable linker flags variable
# INCLUDE_DIRS : include directories
# LINK_DIRS : link directories
@@ -391,13 +393,14 @@ endfunction()
# px4_os_add_flags(
# C_FLAGS CMAKE_C_FLAGS
# CXX_FLAGS CMAKE_CXX_FLAGS
# OPTIMIZATION_FLAGS optimization_flags
# EXE_LINKER_FLAG CMAKE_EXE_LINKER_FLAGS
# INCLUDES <list>)
#
function(px4_os_add_flags)
set(inout_vars
C_FLAGS CXX_FLAGS EXE_LINKER_FLAGS INCLUDE_DIRS LINK_DIRS DEFINITIONS)
C_FLAGS CXX_FLAGS OPTIMIZATION_FLAGS EXE_LINKER_FLAGS INCLUDE_DIRS LINK_DIRS DEFINITIONS)
px4_parse_function_args(
NAME px4_os_add_flags
@@ -409,6 +412,7 @@ function(px4_os_add_flags)
BOARD ${BOARD}
C_FLAGS ${C_FLAGS}
CXX_FLAGS ${CXX_FLAGS}
OPTIMIZATION_FLAGS ${OPTIMIZATION_FLAGS}
EXE_LINKER_FLAGS ${EXE_LINKER_FLAGS}
INCLUDE_DIRS ${INCLUDE_DIRS}
LINK_DIRS ${LINK_DIRS}