Fix dropping system C_FLAGS

.drone.yml

@@ -53,12 +53,6 @@ steps:
     api_key:
       from_secret: gitea_token
     base_url: https://git.serguzim.me
-    checksum:
-    - md5
-    - sha256
-    - sha512
-    files:
-    - emgauwa-core.conf
     title: ${DRONE_TAG}
 
   when:

CMakeLists.txt

@@ -8,8 +8,8 @@ add_executable(core src/main.c)
 target_link_libraries(core -lsqlite3)
 target_link_libraries(core -luuid)
 
-set(CMAKE_C_FLAGS "$ENV{CFLAGS}")
-set(CMAKE_C_FLAGS "-D'__FILENAME__=\"$(subst $(realpath ${CMAKE_SOURCE_DIR}/src/)/,,$(abspath $<))\"'")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} $ENV{CFLAGS}")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D'__FILENAME__=\"$(subst $(realpath ${CMAKE_SOURCE_DIR}/src/)/,,$(abspath $<))\"'")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O3 -std=gnu99 -Wpedantic -Werror -Wall -Wextra")
 
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g -fprofile-arcs -ftest-coverage")