more improvements in builds setup

- moved slang shaders to spvshaders to separate software and hardware
  shaders
- split Makefile.am into Makefile.am, src/Makefile.am and
  src/spvshaders/Makefile.am
- build shaders as DATA primary, instead of both PROGRAMS and SCRIPTS,
  which greatly simplifies building. Before that, we had to first build
  them as PROGRAMS, and then copy them as SCRIPTS to remove executable
  extensions (i.e. ".exe" for Windows)
- changed final executable dir from enginedir to bindir, which makes
  automake see it as an exec instead of data
- compute relative paths from C++, which makes it possible to change
  dirs arbitrarily when running make while still having a relocatable
  executable
- updated README.md to reflect changes in dirs
- use AX_COMPARE_VERSION() to simplify checking if Vulkan headers
  version is correct
- factored out most of paths computation in engine::path_utils::Paths

1 files changed, 11 insertions, 11 deletions

diff --git a/README.md b/README.md
index 9ce7885..2141e3f 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ While inside the directory containing all files:
     :::sh
     mkdir build
     cd build
-    ../configure --prefix="$(realpath .)" --with-ncurses
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" --with-ncurses
     make
     make install
 
@@ -70,7 +70,7 @@ than the ones given by `pkgconf`, you have to set both `GLFW3_CFLAGS` and `GLFW3
 `configure` command line, like so:
 
     :::sh
-    ../configure --prefix="$(realpath .)" --with-ncurses \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" --with-ncurses \
       GLFW3_CFLAGS=-I/path/to/glfw/headers \
       GLFW3_LIBS=-L/path/to/glfw/libs -lglfw3
 
@@ -79,7 +79,7 @@ LunarG's Vulkan SDK, you have to set both `VULKAN_CFLAGS` and `VULKAN_LIBS` in t
 command line, like so:
 
     :::sh
-    ../configure --prefix="$(realpath .)" --with-ncurses \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" --with-ncurses \
       VULKAN_CFLAGS=-I/path/to/vulkan/headers \
       VULKAN_LIBS=-L/path/to/vulkan/libs -lvulkan
 
@@ -87,7 +87,7 @@ If `slangc` cannot be found in path, or if you also want to use the one given by
 SDK, you have to set `SLANGC` to the path of the executable, like so:
 
     :::sh
-    ../configure --prefix="$(realpath .)" --with-ncurses \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" --with-ncurses \
       SLANGC=/path/to/slangc
 
 If ncurses headers or libncurses.so cannot be found, or if you want to use ones other than the ones
@@ -95,14 +95,14 @@ given by `pkgconf`, you have to set both `NCURSES_CFLAGS` and `NCURSES_LIBS` in
 command line, like so:
 
     :::sh
-    ../configure --prefix="$(realpath .)" --with-ncurses \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" --with-ncurses \
       NCURSES_CFLAGS=-I/path/to/ncurses/headers \
       NCURSES_LIBS=-L/path/to/ncurses/libs -lvulkan
 
 You can, of course, combine as many as you like:
 
     :::sh
-    ../configure --prefix="$(realpath .)" --with-ncurses \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" --with-ncurses \
       GLFW3_CFLAGS=-I/path/to/glfw/headers \
       GLFW3_LIBS=-L/path/to/glfw/libs -lglfw3 \
       VULKAN_CFLAGS=-I/path/to/vulkan/headers \
@@ -134,7 +134,7 @@ While inside the directory containing all files:
     :::sh
     mkdir build
     cd build
-    ../configure --prefix="$(realpath .)" \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" \
       --build x86_64-pc-linux-gnu \
       --host x86_64-w64-mingw32
     make
@@ -153,7 +153,7 @@ than the ones given by `pkgconf`, you have to set both `GLFW3_CFLAGS` and `GLFW3
 `configure` command line, like so:
 
     :::sh
-    ../configure --prefix="$(realpath .)" \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" \
       --build x86_64-pc-linux-gnu \
       --host x86_64-w64-mingw32 \
       GLFW3_CFLAGS=-I/path/to/glfw/headers \
@@ -164,7 +164,7 @@ LunarG's Vulkan SDK, you have to set both `VULKAN_CFLAGS` and `VULKAN_LIBS` in t
 command line, like so:
 
     :::sh
-    ../configure --prefix="$(realpath .)" \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" \
       --build x86_64-pc-linux-gnu \
       --host x86_64-w64-mingw32 \
       VULKAN_CFLAGS=-I/path/to/vulkan/headers \
@@ -174,7 +174,7 @@ If `slangc` cannot be found in path, or if you also want to use the one given by
 SDK, you have to set `SLANGC` to the path of the executable, like so:
 
     :::sh
-    ../configure --prefix="$(realpath .)" \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" \
       --build x86_64-pc-linux-gnu \
       --host x86_64-w64-mingw32 \
       SLANGC=/path/to/slangc
@@ -182,7 +182,7 @@ SDK, you have to set `SLANGC` to the path of the executable, like so:
 You can, of course, combine as many as you like:
 
     :::sh
-    ../configure --prefix="$(realpath .)" \
+    ../configure --prefix="$(realpath .)" --bindir="$(realpath share/engine)" \
       --build x86_64-pc-linux-gnu \
       --host x86_64-w64-mingw32 \
       GLFW3_CFLAGS=-I/path/to/glfw/headers \