Fixes for compilation for many platforms.

Split gubmo and litehtml to different CMake projects with different
compile languages.
Move 'src/strings.h' to 'src/gumbo/visualc/include/strings.h'.
Remove '../src/' in '#include' directive in litehtml.h and
add target_include_directories() in CMake project.
Set C/C++ standard flags by set_target_properties() in CMake project.
Do not set build type and C/C++ compiler flags in library project.

CMakeLists.txt

@@ -1,74 +1,58 @@
 cmake_minimum_required(VERSION 2.8)
 
-project(litehtml)
+project(litehtml CXX)
 
-if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
-    message(STATUS "No build type selected, default to Release")
-    set(CMAKE_BUILD_TYPE "Release")
-endif()
+add_subdirectory(src/gumbo)
 
-if(NOT MSVC)
-	set(CMAKE_CXX_FLAGS "-std=c++11")
-	set(CMAKE_CXX_FLAGS_DEBUG "-O0 -DDEBUG -g")
-	set(CMAKE_C_FLAGS_DEBUG "-std=c99 -O0 -DDEBUG -g")
-	set(CMAKE_CXX_FLAGS_RELEASE "-O3")
-	set(CMAKE_C_FLAGS_RELEASE "-std=c99 -O3")
-endif()
-
-set(SOURCE_LITEHTML src/background.cpp
-                    src/box.cpp
-                    src/context.cpp
-                    src/css_length.cpp
-                    src/css_selector.cpp
-                    src/document.cpp
-                    src/el_anchor.cpp
-                    src/el_base.cpp
-                    src/el_before_after.cpp
-                    src/el_body.cpp
-                    src/el_break.cpp
-                    src/el_cdata.cpp
-                    src/el_comment.cpp
-                    src/el_div.cpp
-                    src/element.cpp
-                    src/el_font.cpp
-                    src/el_image.cpp
-                    src/el_link.cpp
-                    src/el_para.cpp
-                    src/el_script.cpp
-                    src/el_space.cpp
-                    src/el_style.cpp
-                    src/el_table.cpp
-                    src/el_td.cpp
-                    src/el_text.cpp
-                    src/el_title.cpp
-                    src/el_tr.cpp
-                    src/html.cpp
-                    src/html_tag.cpp
-                    src/iterators.cpp
-                    src/media_query.cpp
-                    src/style.cpp
-                    src/stylesheet.cpp
-                    src/table.cpp
-                    src/utf8_strings.cpp
-                    src/web_color.cpp
+set(SOURCE_LITEHTML
+    src/background.cpp
+    src/box.cpp
+    src/context.cpp
+    src/css_length.cpp
+    src/css_selector.cpp
+    src/document.cpp
+    src/el_anchor.cpp
+    src/el_base.cpp
+    src/el_before_after.cpp
+    src/el_body.cpp
+    src/el_break.cpp
+    src/el_cdata.cpp
+    src/el_comment.cpp
+    src/el_div.cpp
+    src/element.cpp
+    src/el_font.cpp
+    src/el_image.cpp
+    src/el_link.cpp
+    src/el_para.cpp
+    src/el_script.cpp
+    src/el_space.cpp
+    src/el_style.cpp
+    src/el_table.cpp
+    src/el_td.cpp
+    src/el_text.cpp
+    src/el_title.cpp
+    src/el_tr.cpp
+    src/html.cpp
+    src/html_tag.cpp
+    src/iterators.cpp
+    src/media_query.cpp
+    src/style.cpp
+    src/stylesheet.cpp
+    src/table.cpp
+    src/utf8_strings.cpp
+    src/web_color.cpp
 )
 
-set(SOURCE_GUMBO    src/gumbo/attribute.c
-                    src/gumbo/char_ref.c
-                    src/gumbo/error.c
-                    src/gumbo/parser.c
-                    src/gumbo/string_buffer.c
-                    src/gumbo/string_piece.c
-                    src/gumbo/tag.c
-                    src/gumbo/tokenizer.c
-                    src/gumbo/utf8.c
-                    src/gumbo/util.c
-                    src/gumbo/vector.c
+add_library(${PROJECT_NAME} ${SOURCE_LITEHTML})
+
+set_target_properties(${PROJECT_NAME} PROPERTIES
+    CXX_STANDARD 11
+    C_STANDARD 99
 )
 
-add_library(litehtml STATIC ${SOURCE_LITEHTML} ${SOURCE_GUMBO})
-
-if(WIN32)
-     target_include_directories(litehtml PUBLIC src/gumbo)
-endif()
+# Export litehtml includes.
+target_include_directories(${PROJECT_NAME} PUBLIC src)
+target_include_directories(${PROJECT_NAME} PUBLIC include)
 
+# Gumbo
+target_link_libraries(${PROJECT_NAME} PUBLIC gumbo)

include/litehtml.h

@@ -1,12 +1,12 @@
 #ifndef LITEHTML_H
 #define LITEHTML_H
 
-#include "../src/html.h"
-#include "../src/document.h"
-#include "../src/html_tag.h"
-#include "../src/stylesheet.h"
-#include "../src/stylesheet.h"
-#include "../src/element.h"
-#include "../src/html_tag.h"
+#include "html.h"
+#include "document.h"
+#include "html_tag.h"
+#include "stylesheet.h"
+#include "stylesheet.h"
+#include "element.h"
+#include "html_tag.h"
 
 #endif  // LITEHTML_H

src/gumbo/CMakeLists.txt

@@ -0,0 +1,30 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(gumbo C)
+
+set(SOURCE_GUMBO
+    attribute.c
+    char_ref.c
+    error.c
+    parser.c
+    string_buffer.c
+    string_piece.c
+    tag.c
+    tokenizer.c
+    utf8.c
+    util.c
+    vector.c
+)
+
+add_library(${PROJECT_NAME} ${SOURCE_GUMBO})
+
+set_target_properties(${PROJECT_NAME} PROPERTIES
+    C_STANDARD 99
+)
+
+if(MSVC)
+    target_include_directories(${PROJECT_NAME} PRIVATE visualc/include)
+endif()
+
+# Export gumbo includes.
+target_include_directories(${PROJECT_NAME} PUBLIC ${PROJECT_SOURCE_DIR})