CMakeLists.txt: fix clean_all target; add missing 'add_compile_option…

…s(-Wno-c99-extensions ...)'

CMakeLists.txt

@@ -158,9 +158,9 @@ add_compile_options(-pedantic) # -Werror is enabled only for development and CI,
 add_compile_options(
   -Wall -Woverflow -Wextra -Wmissing-prototypes -Wstrict-prototypes -Wswitch
   -Wsign-compare -Wformat -Wtype-limits -Wundef -Wconversion -Wunused-parameter)
+add_compile_options(-Wno-c99-extensions -Wno-language-extension-token -Wno-declaration-after-statement -Wno-embedded-directive)
 # because of libsecutils:
 add_compile_options(-Wno-sign-conversion -Wno-shorten-64-to-32 -Wno-shadow)
-
 # TODO maybe clean up code and re-enable property
 # set_property(TARGET ${LIBGENCMP_NAME} PROPERTY C_STANDARD 90)
 # set_property(TARGET cmpClient         PROPERTY C_STANDARD 90)
@@ -279,11 +279,12 @@ if(NOT TARGET clean_all)
     COMMAND ${CMAKE_BUILD_TOOL} clean
     COMMAND find . -name "*.o" -o -name "*.d" -o -regex "./libgencmp-.*" | xargs rm
     # after the following, cannot call this target again:
+    COMMAND rm -r build
     COMMAND find . ( -name "*.cmake" -o -name Makefile )
-            -not path ./ libsecutils -not -path ./cmpossl
+            -not -path ./libsecutils -not -path ./cmpossl
             | xargs rm
     COMMAND find . -name CMakeFiles
-            -not path ./ libsecutils -not -path ./cmpossl
+            -not -path ./libsecutils -not -path ./cmpossl
             | xargs rm -r
     COMMAND rm CMakeCache.txt
     VERBATIM