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kumquat-buildroot/package/mraa/0002-CMakeLists.txt-add-BUILDCPP-option.patch

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package/mraa: drop C++ dependency Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2020-10-04 13:10:29 +02:00
From cb88e4dd1fbbb9d24e625dba2768b88ed99da309 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Sat, 13 Jun 2020 22:51:37 +0200
Subject: [PATCH] CMakeLists.txt: add BUILDCPP option
C++ is a mandatory dependency since version 1.4.0 and
https://github.com/eclipse/mraa/commit/122cab1f1e53b7c9c7cd82905b962071f9bad9dc
As a result, build on embedded toolchains that do not support C++ fails
on:
CMake Error at CMakeLists.txt:2 (project):
The CMAKE_CXX_COMPILER:
/home/naourr/work/instance-1/output-1/per-package/mraa/host/bin/arm-linux-g++
is not a full path to an existing compiler tool.
Fixes:
- http://autobuild.buildroot.org/results/31086422e03611c16ab59c4418e3669b580bc0c0
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Retrieved from:
https://github.com/eclipse/mraa/commit/cb88e4dd1fbbb9d24e625dba2768b88ed99da309]
---
CMakeLists.txt | 69 +++++++++++++++++++----------------
src/java/CMakeLists.txt | 4 +-
src/javascript/CMakeLists.txt | 34 +++++++++--------
3 files changed, 59 insertions(+), 48 deletions(-)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 250d9106e..90c0dc920 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
cmake_minimum_required (VERSION 2.8.11)
-project (mraa C CXX)
+project (mraa C)
FIND_PACKAGE (Threads REQUIRED)
@@ -11,6 +11,8 @@ else ()
set (CMAKE_C_STANDARD 99)
endif ()
+option (BUILDCPP "Enable C++ (needed by FTDI4222 and tests)" ON)
+
###############################################################################
# Detect supported warning flags
# Modified from work By Dan Liew (fpbench - MIT)
@@ -33,15 +35,18 @@ set (MRAA_C_WARNING_FLAGS
-Werror=missing-parameter-type
)
-# Warning flags for the C++ compiler only
-set (MRAA_CXX_WARNING_FLAGS
- -Wnon-virtual-dtor
- -Woverloaded-virtual
- -Wreorder
-)
-
include (CheckCCompilerFlag)
-include (CheckCXXCompilerFlag)
+if (BUILDCPP)
+ # Warning flags for the C++ compiler only
+ set (MRAA_CXX_WARNING_FLAGS
+ -Wnon-virtual-dtor
+ -Woverloaded-virtual
+ -Wreorder
+ )
+
+ enable_language (CXX)
+ include (CheckCXXCompilerFlag)
+endif ()
function (MRAA_SANITIZE_FLAG_NAME OUTPUT_VAR FLAG)
string (REPLACE "-" "_" SANITIZED_FLAG_NAME "${FLAG}")
string (REPLACE "/" "_" SANITIZED_FLAG_NAME "${SANITIZED_FLAG_NAME}")
@@ -62,28 +67,30 @@ foreach (flag ${MRAA_BOTH_WARNING_FLAGS} ${MRAA_C_WARNING_FLAGS})
endif ()
endforeach ()
-# Globally set C++ compiler warning flags that are supported and emit
-# a warning about unsupported flags
-foreach (flag ${MRAA_BOTH_WARNING_FLAGS} ${MRAA_CXX_WARNING_FLAGS})
- MRAA_SANITIZE_FLAG_NAME (SANITIZED_FLAG_NAME "${flag}")
- CHECK_CXX_COMPILER_FLAG ("${flag}" HAS_CXX_${SANITIZED_FLAG_NAME})
- if (HAS_CXX_${SANITIZED_FLAG_NAME})
- set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
- else ()
- message (WARNING "C++ compiler does not support flag \"${flag}\"")
- endif ()
-endforeach ()
-
-# This function adds the c++11 flag to a c++ target (if supported)
-function(use_cxx_11 targetname)
- include(CheckCXXCompilerFlag)
- CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
- if (COMPILER_SUPPORTS_CXX11)
- set_target_properties(${targetname} PROPERTIES COMPILE_FLAGS "-std=c++11")
- else()
- message(FATAL_ERROR "Target '${targetname}' requires c++11 which is not supported by this compiler")
- endif()
-endfunction()
+if (BUILDCPP)
+ # Globally set C++ compiler warning flags that are supported and emit
+ # a warning about unsupported flags
+ foreach (flag ${MRAA_BOTH_WARNING_FLAGS} ${MRAA_CXX_WARNING_FLAGS})
+ MRAA_SANITIZE_FLAG_NAME (SANITIZED_FLAG_NAME "${flag}")
+ CHECK_CXX_COMPILER_FLAG ("${flag}" HAS_CXX_${SANITIZED_FLAG_NAME})
+ if (HAS_CXX_${SANITIZED_FLAG_NAME})
+ set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
+ else ()
+ message (WARNING "C++ compiler does not support flag \"${flag}\"")
+ endif ()
+ endforeach ()
+
+ # This function adds the c++11 flag to a c++ target (if supported)
+ function(use_cxx_11 targetname)
+ include(CheckCXXCompilerFlag)
+ CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
+ if (COMPILER_SUPPORTS_CXX11)
+ set_target_properties(${targetname} PROPERTIES COMPILE_FLAGS "-std=c++11")
+ else()
+ message(FATAL_ERROR "Target '${targetname}' requires c++11 which is not supported by this compiler")
+ endif()
+ endfunction()
+endif()
# Set CMAKE_INSTALL_LIBDIR if not defined
include(GNUInstallDirs)
diff --git a/src/java/CMakeLists.txt b/src/java/CMakeLists.txt
index 231c755fa..cfa72a0df 100644
--- a/src/java/CMakeLists.txt
+++ b/src/java/CMakeLists.txt
@@ -16,7 +16,9 @@ include_directories (
set_source_files_properties (mraajava.i PROPERTIES SWIG_FLAGS ";-package;mraa;-I${CMAKE_BINARY_DIR}/src")
set_source_files_properties (mraajava.i PROPERTIES CPLUSPLUS ON)
-set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive -DJAVACALLBACK")
+if (BUILDCPP)
+ set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive -DJAVACALLBACK")
+endif()
set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DJAVACALLBACK")
if (NOT DEFINED ENV{JAVA_HOME_NATIVE})
diff --git a/src/javascript/CMakeLists.txt b/src/javascript/CMakeLists.txt
index 25fd36275..99a96b49d 100644
--- a/src/javascript/CMakeLists.txt
+++ b/src/javascript/CMakeLists.txt
@@ -36,25 +36,27 @@ set_target_properties (mraajs PROPERTIES
)
message (STATUS "INFO - swig Version ${SWIG_VERSION}")
-message (STATUS "INFO - CXX compiler Version ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}")
+if (BUILDCPP)
+ message (STATUS "INFO - CXX compiler Version ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}")
-if (${V8_VERSION_MAJOR} GREATER 3)
- message (STATUS "INFO - Using V8 version > 3 so requiring C++11 compiler")
- # Node 0.12.x V8 engine major version is '3'.
- # Node 2.1.0 V8 engine major version is '4'.
- set_property (TARGET mraajs PROPERTY CXX_STANDARD 11)
- set_property (TARGET mraajs PROPERTY CXX_STANDARD_REQUIRED ON)
- if (CMAKE_VERSION VERSION_LESS "3.1")
- message (WARNING "Need to use CMAKE version 3.1+, but it is ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION}, using a workaround.")
- if (CMAKE_COMPILER_IS_GNUCXX)
- if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.7")
- message (FATAL_ERROR "GNU gcc compiler is also too old (need 4.7+, but ${CMAKE_CXX_COMPILER_VERSION}) and does not support C++11 standard.")
+ if (${V8_VERSION_MAJOR} GREATER 3)
+ message (STATUS "INFO - Using V8 version > 3 so requiring C++11 compiler")
+ # Node 0.12.x V8 engine major version is '3'.
+ # Node 2.1.0 V8 engine major version is '4'.
+ set_property (TARGET mraajs PROPERTY CXX_STANDARD 11)
+ set_property (TARGET mraajs PROPERTY CXX_STANDARD_REQUIRED ON)
+ if (CMAKE_VERSION VERSION_LESS "3.1")
+ message (WARNING "Need to use CMAKE version 3.1+, but it is ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}.${CMAKE_PATCH_VERSION}, using a workaround.")
+ if (CMAKE_COMPILER_IS_GNUCXX)
+ if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.7")
+ message (FATAL_ERROR "GNU gcc compiler is also too old (need 4.7+, but ${CMAKE_CXX_COMPILER_VERSION}) and does not support C++11 standard.")
+ endif ()
+ set (MRAA_CXX11_WORKAROUND_OPTION "-std=gnu++11")
+ else ()
+ set (MRAA_CXX11_WORKAROUND_OPTION "-std=c++11")
endif ()
- set (MRAA_CXX11_WORKAROUND_OPTION "-std=gnu++11")
- else ()
- set (MRAA_CXX11_WORKAROUND_OPTION "-std=c++11")
+ set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MRAA_CXX11_WORKAROUND_OPTION} ")
endif ()
- set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${MRAA_CXX11_WORKAROUND_OPTION} ")
endif ()
endif ()
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