Remove build for risc-v CPUs.

Author: dmitry1945

opencv/CMakeLists.txt

@@ -19,21 +19,22 @@ set(extra_defines -D_DEFAULT_SOURCE)
 # Final flags for C and C++:
 set(c_flags "${includes} ${extra_defines}")
 set(cxx_flags "${includes} ${extra_defines}")
-## These flags for lates GCC to enable -DCV_INT32_T_IS_LONG_INT=ON
-# set(c_flags "${includes} ${extra_defines} -DCV_INT32_T_IS_LONG_INT=ON")
-# set(cxx_flags "${includes} ${extra_defines} -DCV_INT32_T_IS_LONG_INT=ON")
+
+set(common_flags "-ggdb  -ffunction-sections -fdata-sections")
 
 # Calculate flags for optimizations, assertions, debug info:
-#if(COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE)
-#    set(assert_flags "-DNDEBUG")
-#else()
-#    set(assert_flags "-DDEBUG -D_DEBUG")
-#endif()
+if(COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE)
+   set(assert_flags "-DNDEBUG")
+else()
+   set(assert_flags "-DDEBUG -D_DEBUG")
+endif()
 
-set(assert_flags "${assert_flags} -DDEBUG -D_DEBUG -ffunction-sections -fdata-sections")
+if(CONFIG_IDF_TARGET_ARCH_XTENSA)
+    set(assert_flags "${assert_flags} -mlongcalls")
+endif()
 
 if(CONFIG_COMPILER_OPTIMIZATION_DEFAULT)
-    set(opt_flags "-Og -ggdb -mlongcalls ${assert_flags}")
+    set(opt_flags "-Og ${common_flags} ${assert_flags}")
     set(opt_args -DCMAKE_BUILD_TYPE=Debug
                  -DCMAKE_C_FLAGS_DEBUG=${opt_flags}
                  -DCMAKE_CXX_FLAGS_DEBUG=${opt_flags})
@@ -42,20 +43,20 @@ elseif(CONFIG_COMPILER_OPTIMIZATION_SIZE)
     # however OpenCV CMake files only handle Debug and Release
     # (see e.g. opencv/cmake/OpenCVCompilerOptions.cmake).
     # So we redefine the flags for Release instead.
-    set(opt_flags "-Os -ggdb -mlongcalls ${assert_flags}")
+    set(opt_flags "-Os ${common_flags} ${assert_flags}")
     set(opt_args -DCMAKE_BUILD_TYPE=Release
                  -DCMAKE_C_FLAGS_RELEASE=${opt_flags}
                  -DCMAKE_CXX_FLAGS_RELEASE=${opt_flags})
 elseif(COMPILER_OPTIMIZATION_PERF)
     # Currently OpenCV fails to compile at -O2 level on Xtensa due to a compiler issue,
     # details in https://github.com/jcmvbkbc/gcc-xtensa/issues/14.
     # Compiling at -O3 happens to be okay.
-    set(opt_flags "-O3 -ggdb -mlongcalls ${assert_flags}")
+    set(opt_flags "-O3 ${common_flags} ${assert_flags}")
     set(opt_args -DCMAKE_BUILD_TYPE=Release
                  -DCMAKE_C_FLAGS_RELEASE=${opt_flags}
                  -DCMAKE_CXX_FLAGS_RELEASE=${opt_flags})
 elseif(COMPILER_OPTIMIZATION_NONE)
-    set(opt_flags "-O0 -ggdb -mlongcalls ${assert_flags}")
+    set(opt_flags "-O0 ${common_flags} ${assert_flags}")
     set(opt_args -DCMAKE_BUILD_TYPE=Debug
                  -DCMAKE_C_FLAGS_DEBUG=${opt_flags}
                  -DCMAKE_CXX_FLAGS_DEBUG=${opt_flags})

opencv/README.md

@@ -1,7 +1,7 @@
 # OpenCV library build for esp-idf
-This project used to build and include OpenCV library into the esp-idf as a component.
+This project used to build and include OpenCV library into the esp-idf as a component for esp32, esp32s2 and esp32s3 CPUs.
 Now the opencv could be build with IDF version 4.4. 
 This component was tested with opencv V 4.6.0
-The build is working on Linux machines.
+The build is working only on Linux machines.
 
 More details about OpenCV can be found [here](https://opencv.org/).

opencv/idf_component.yml

@@ -3,3 +3,7 @@ description: OpenCV build for esp-idf
 url: https://github.com/espressif/idf-extra-components/tree/master/opencv
 dependencies:
   idf: "==4.4"
+targets:
+  - esp32
+  - esp32s2
+  - esp32s3

test_app/CMakeLists.txt

@@ -14,12 +14,16 @@ endif()
 
 # 2.1. Add here if the component is compatible with IDF == v4.3
 if("${IDF_VERSION_MAJOR}.${IDF_VERSION_MINOR}" VERSION_EQUAL "4.3")
-    list(APPEND EXTRA_COMPONENT_DIRS ../opencv)
+    if((${IDF_TARGET} STREQUAL "esp32") OR (${IDF_TARGET} STREQUAL "esp32s2") OR (${IDF_TARGET} STREQUAL "esp32s3"))
+        list(APPEND EXTRA_COMPONENT_DIRS ../opencv)
+    endif()
 endif()
 
 # 2.2. Add here if the component is compatible with IDF == v4.4
 if("${IDF_VERSION_MAJOR}.${IDF_VERSION_MINOR}" VERSION_EQUAL "4.4")
-    list(APPEND EXTRA_COMPONENT_DIRS ../opencv)
+    if((${IDF_TARGET} STREQUAL "esp32") OR (${IDF_TARGET} STREQUAL "esp32s2") OR (${IDF_TARGET} STREQUAL "esp32s3"))
+        list(APPEND EXTRA_COMPONENT_DIRS ../opencv)
+    endif()
 endif()
 
 # 3. Add here if the component is compatible with IDF >= v5.0