build: Add initial Autotools files.

.gitignore

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+aclocal.m4
+autom4te.cache
+config.log
+config.status
+configure
+libtool
+Makefile
+Makefile.in
+
+vkd3d-*.tar.gz
+
+*.la
+*.lo
+*.pc
+*~
+
+.deps
+.dirstamp
+.libs

Makefile.am

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+ACLOCAL_AMFLAGS = -I m4

README

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+vkD3D - Direct3D 12 to Vulkan translation library

autogen.sh

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+#!/bin/sh
+set -e
+autoreconf -ifv
+rm -rf autom4te.cache

bin/.gitignore

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+ar-lib
+compile
+config.guess
+config.sub
+depcomp
+install-sh
+ltmain.sh
+missing
+test-driver

configure.ac

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+AC_PREREQ([2.69])
+AC_INIT([vkd3d], 0.0.0)
+
+AC_CONFIG_AUX_DIR([bin])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_LIBOBJ_DIR([portable])
+AC_CONFIG_HEADERS(include/config.h)
+
+dnl Check for progs
+AM_PROG_AR
+AC_PROG_CC
+AM_PROG_CC_C_O
+AC_PROG_SED
+AC_PROG_MKDIR_P
+
+AM_INIT_AUTOMAKE([1.11 foreign silent-rules subdir-objects -Wall -Werror])
+AM_MAINTAINER_MODE([enable])
+
+LT_PREREQ([2.4.2])
+LT_INIT
+
+dnl Check compiler specific flags
+AC_SUBST(VKD3D_CLFAGS, "")
+if test "x${GCC}" = "xyes"
+then
+    VKD3D_CFLAGS="-Wall -pipe"
+
+    VKD3D_CHECK_CFLAGS([-std=c99])
+    VKD3D_CHECK_CFLAGS([-Wdeclaration-after-statement])
+    VKD3D_CHECK_CFLAGS([-Wmissing-prototypes])
+    VKD3D_CHECK_CFLAGS([-Wunused-but-set-parameter])
+    VKD3D_CHECK_CFLAGS([-Wvla])
+fi
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT

include/.gitignore

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+config.h
+config.h.in
+stamp-h1

m4/.gitignore

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+libtool.m4
+ltoptions.m4
+ltsugar.m4
+ltversion.m4
+lt~obsolete.m4

m4/check-cflags.m4

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+dnl VKD3D_CHECK_CFLAGS(flags)
+AC_DEFUN([VKD3D_CHECK_CFLAGS],
+[AS_VAR_PUSHDEF([ac_var], ac_cv_cflags_[[$1]])dnl
+AC_CACHE_CHECK([whether the compiler supports $1], ac_var,
+[ac_vkd3d_check_cflags_saved=$CFLAGS
+CFLAGS="$CFLAGS $1 -Werror"
+AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(int argc, char **argv) { return 0; }]])],
+               [AS_VAR_SET(ac_var, yes)], [AS_VAR_SET(ac_var, no)])
+CFLAGS=$ac_vkd3d_check_cflags_saved])
+AS_VAR_IF([ac_var], [yes], [VKD3D_CFLAGS="$VKD3D_CFLAGS $1"])dnl
+AS_VAR_POPDEF([ac_var])])