build: remove unused variable CMAKE_C_COMPILER_ARG1

It was set in file cmake/i386-linux-gnu.toolchain.cmake which has been
removed since we don't use Travis anymore.

cmake.deps/CMakeLists.txt

@@ -101,11 +101,7 @@ if(MINGW AND CMAKE_GENERATOR MATCHES "Ninja")
   endif()
 endif()
 
-if(CMAKE_C_COMPILER_ARG1)
-  set(DEPS_C_COMPILER "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}")
-else()
-  set(DEPS_C_COMPILER "${CMAKE_C_COMPILER}")
-endif()
+set(DEPS_C_COMPILER "${CMAKE_C_COMPILER}")
 
 if(CMAKE_CXX_COMPILER)
   set(DEPS_CXX_COMPILER "${CMAKE_CXX_COMPILER}")

cmake.deps/cmake/BuildLibvterm.cmake

@@ -10,10 +10,8 @@ if(WIN32)
       -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
       -DCMAKE_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
       -DCMAKE_GENERATOR=${CMAKE_GENERATOR})
-  if(MSVC)
-    list(APPEND LIBVTERM_CONFIGURE_COMMAND "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1}")
-  else()
-    list(APPEND LIBVTERM_CONFIGURE_COMMAND "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1} -fPIC")
+  if(NOT MSVC)
+    list(APPEND LIBVTERM_CONFIGURE_COMMAND "-DCMAKE_C_FLAGS:STRING=-fPIC")
   endif()
   set(LIBVTERM_BUILD_COMMAND ${CMAKE_COMMAND} --build . --config $<CONFIG>)
   set(LIBVTERM_INSTALL_COMMAND ${CMAKE_COMMAND} --build . --target install --config $<CONFIG>)

cmake.deps/cmake/BuildLua.cmake

@@ -28,7 +28,7 @@ if(CLANG_ASAN_UBSAN)
 endif()
 
 set(LUA_CONFIGURE_COMMAND
-  sed -e "/^CC/s@gcc@${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}@"
+  sed -e "/^CC/s@gcc@${CMAKE_C_COMPILER}@"
       -e "/^CFLAGS/s@-O2@${LUA_CFLAGS}@"
       -e "/^MYLDFLAGS/s@$@${LUA_LDFLAGS}@"
       -e "s@-lreadline@@g"

cmake.deps/cmake/BuildLuv.cmake

@@ -40,8 +40,7 @@ if(MSVC)
     ${LUV_CONFIGURE_COMMAND_COMMON}
     -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
     -DCMAKE_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
-    # Same as Unix without fPIC
-    "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1} ${LUV_INCLUDE_FLAGS}"
+    "-DCMAKE_C_FLAGS:STRING=${LUV_INCLUDE_FLAGS}"
     # Make sure we use the same generator, otherwise we may
     # accidentally end up using different MSVC runtimes
     -DCMAKE_GENERATOR=${CMAKE_GENERATOR})
@@ -49,7 +48,7 @@ else()
   set(LUV_CONFIGURE_COMMAND
     ${LUV_CONFIGURE_COMMAND_COMMON}
     -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
-    "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1} ${LUV_INCLUDE_FLAGS} -fPIC")
+    "-DCMAKE_C_FLAGS:STRING=${LUV_INCLUDE_FLAGS} -fPIC")
   if(CMAKE_GENERATOR MATCHES "Unix Makefiles" AND
       (CMAKE_SYSTEM_NAME MATCHES ".*BSD" OR CMAKE_SYSTEM_NAME MATCHES "DragonFly"))
       set(LUV_CONFIGURE_COMMAND ${LUV_CONFIGURE_COMMAND} -DCMAKE_MAKE_PROGRAM=gmake)

cmake.deps/cmake/BuildMsgpack.cmake

@@ -4,7 +4,7 @@ set(MSGPACK_CONFIGURE_COMMAND ${CMAKE_COMMAND} ${DEPS_BUILD_DIR}/src/msgpack
   -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
   -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
   -DCMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES_ALT_SEP}
-  "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1} -fPIC"
+  "-DCMAKE_C_FLAGS:STRING=-fPIC"
   -DCMAKE_GENERATOR=${CMAKE_GENERATOR})
 
 if(MSVC)
@@ -16,7 +16,6 @@ if(MSVC)
     -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
     -DCMAKE_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
     ${BUILD_TYPE_STRING}
-    "-DCMAKE_C_FLAGS:STRING=${CMAKE_C_COMPILER_ARG1}"
     # Make sure we use the same generator, otherwise we may
     # accidentally end up using different MSVC runtimes
     -DCMAKE_GENERATOR=${CMAKE_GENERATOR})

cmake/GetCompileFlags.cmake

@@ -2,14 +2,6 @@ function(get_compile_flags _compile_flags)
   # Create template akin to CMAKE_C_COMPILE_OBJECT.
   set(compile_flags "<CMAKE_C_COMPILER> <CFLAGS> <BUILD_TYPE_CFLAGS> <COMPILE_OPTIONS><COMPILE_DEFINITIONS> <INCLUDES>")
 
-  # Get C compiler.
-  if(CMAKE_C_COMPILER_ARG1)
-    string(REPLACE
-      "<CMAKE_C_COMPILER>"
-      "<CMAKE_C_COMPILER> ${CMAKE_C_COMPILER_ARG1}"
-      compile_flags
-      "${compile_flags}")
-  endif()
   string(REPLACE
     "<CMAKE_C_COMPILER>"
     "${CMAKE_C_COMPILER}"