[Tarantool-patches] [PATCH 1/3] build: fix lua.c file generation

[Igor Munkin via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

If Lua source path given to <lua_source> function is relative, the
output file is generated in the binary directory. At the same time if
the given path to be compiled to *.lua.c is absolute, the output
file is generated in source directory instead of the binary one. This
patch fixes the latter case providing the valid behaviour for out of
source build type.

Needed for #4862

Signed-off-by: Igor Munkin <imun@tarantool.org>
---
 cmake/utils.cmake | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cmake/utils.cmake b/cmake/utils.cmake
index eaec821b3..6d6960468 100644
--- a/cmake/utils.cmake
+++ b/cmake/utils.cmake
@@ -40,9 +40,11 @@ endmacro(set_source_files_compile_flags)
 # A helper function to compile *.lua source into *.lua.c sources
 function(lua_source varname filename)
     if (IS_ABSOLUTE "${filename}")
+        string (REPLACE "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}"
+            genname "${filename}")
         set (srcfile "${filename}")
-        set (tmpfile "${filename}.new.c")
-        set (dstfile "${filename}.c")
+        set (tmpfile "${genname}.new.c")
+        set (dstfile "${genname}.c")
     else(IS_ABSOLUTE "${filename}")
         set (srcfile "${CMAKE_CURRENT_SOURCE_DIR}/${filename}")
         set (tmpfile "${CMAKE_CURRENT_BINARY_DIR}/${filename}.new.c")
-- 
2.25.0