From 307c998495a769092a8587c91a3efdb526de909c Mon Sep 17 00:00:00 2001
From: Lázaro Albuquerque <33807434+lzralbu@users.noreply.github.com>
Date: Sun, 16 Jun 2024 04:49:59 -0400
Subject: [build] Making `config.h` fully available to CMake users (#4044)

* Create ParseConfigHeader.cmake

This script parses the config.h file to automate the process of exposing the configuration flags and configuration values found in the latter.

* Update CompileDefinitions.cmake

Makes use of the new functionality found in ParseConfigHeader.cmake to make things consistent.

* Update CMakeOptions.txt

Makes use of the new functionality found in ParseConfigHeader.cmake to make things consistent.

* Update CMakeLists.txt

Changes required to make possible building raylib for web on Windows 10.

* Update LibraryConfigurations.cmake

Removes a warning that linker-only flags were being passed to the compiler, which is in accordance to https://emscripten.org/docs/tools_reference/settings_reference.html.

* Update CMakeOptions.txt

Removed clutter.

* Update CompileDefinitions.cmake

Removed clutter.

* Update CompileDefinitions.cmake

Some applications might check for PLATFORM_WEB instead of __EMSCRIPTEN__.

* Update CompileDefinitions.cmake

Reverting

* Update CMakeLists.txt

USE_AUDIO is redundant in the presence of the already existent and more descriptive SUPPORT_MODULE_RAUDIO.

* Update CompileDefinitions.cmake

USE_AUDIO is redundant in the presence of the already existent and more descriptive SUPPORT_MODULE_RAUDIO.

* Update ParseConfigHeader.cmake

* Revert "Update CMakeLists.txt"

This reverts commit 1785fc06b5b89e65515cea3afd3e3c095f15e350.

* Revert "Update CompileDefinitions.cmake"

This reverts commit 62f9a3a0ea21af7bd0a1ab74d10a305fca2a5695.

* Revert "Update CMakeLists.txt"

This reverts commit 3e7912144edc5c69c53ed5a9515ae21d66937963.

* Revert "Update LibraryConfigurations.cmake"

This reverts commit bcc4310c4960c200c340671caa298983340ea386.
---
 cmake/ParseConfigHeader.cmake | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 cmake/ParseConfigHeader.cmake

(limited to 'cmake/ParseConfigHeader.cmake')

diff --git a/cmake/ParseConfigHeader.cmake b/cmake/ParseConfigHeader.cmake
new file mode 100644
index 00000000..797eea3c
--- /dev/null
+++ b/cmake/ParseConfigHeader.cmake
@@ -0,0 +1,17 @@
+file(READ "${CMAKE_CURRENT_SOURCE_DIR}/src/config.h" CONFIG_HEADER_CONTENT)
+
+set(BLANK_OR_BACKSLASH_PATTERN "[ \t\r\n\\]")
+set(VALID_IDENTIFIER_PATTERN "[A-Za-z_]+[A-Za-z_0-9]*")
+set(VALID_VALUE_PATTERN [=["?[A-Za-z_0-9.-]+"?]=]) # not really correct but does the job since the config.h file hopefully will have been checked by a C preprocessor.
+set(MACRO_REGEX "(//${BLANK_OR_BACKSLASH_PATTERN}*)?\#define${BLANK_OR_BACKSLASH_PATTERN}+(${VALID_IDENTIFIER_PATTERN})${BLANK_OR_BACKSLASH_PATTERN}+(${VALID_VALUE_PATTERN})")
+
+string(REGEX MATCHALL ${MACRO_REGEX} MACRO_LIST ${CONFIG_HEADER_CONTENT})
+
+set(CONFIG_HEADER_FLAGS ${MACRO_LIST})
+list(FILTER CONFIG_HEADER_FLAGS INCLUDE REGEX "^.+SUPPORT_")
+list(TRANSFORM CONFIG_HEADER_FLAGS REPLACE ${MACRO_REGEX} [[\2=OFF]] REGEX "^//")
+list(TRANSFORM CONFIG_HEADER_FLAGS REPLACE ${MACRO_REGEX} [[\2=ON]])
+
+set(CONFIG_HEADER_VALUES ${MACRO_LIST})
+list(FILTER CONFIG_HEADER_VALUES EXCLUDE REGEX "(^.+SUPPORT_)|(^//)")
+list(TRANSFORM CONFIG_HEADER_VALUES REPLACE ${MACRO_REGEX} [[\2=\3]])
-- 
cgit v1.2.3