Add build system
This adds a autoconfig base build system and some test files. To build: 1) autoreconf 2) ./configure 3) makemaster
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include src/Makefile.am
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# -*- Autoconf -*-
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# Process this file with autoconf to produce a configure script.
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AC_PREREQ([2.69])
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AC_INIT([hvif-light], [0.0.1], [commits@schurr.at])
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AC_CONFIG_MACRO_DIR(m4)
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AM_INIT_AUTOMAKE([subdir-objects foreign 1.13])
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AM_SILENT_RULES([yes])
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AC_CONFIG_SRCDIR([src/hvif-light.h])
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AC_CONFIG_HEADERS([src/config.h])
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# Checks C compiler (with empty default flags).
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: ${CFLAGS=""}
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AC_PROG_CC
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AX_CHECK_COMPILE_FLAG([-std=c11],
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[ CFLAGS+=" -std=c11" ],
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[ AC_MSG_ERROR([C compiler doesn't support C11 mode])] )
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# TODO: Update checks once we have code
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# Checks for header files.
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AC_CHECK_HEADERS([limits.h stddef.h stdint.h stdlib.h string.h sys/time.h unistd.h])
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# Checks for typedefs, structures, and compiler characteristics.
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AC_CHECK_HEADER_STDBOOL
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AC_C_INLINE
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AC_TYPE_INT32_T
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AC_TYPE_SIZE_T
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AC_TYPE_UINT32_T
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# Checks for library functions.
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AC_FUNC_MALLOC
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AC_FUNC_REALLOC
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AC_CHECK_FUNCS([memmove memset mkdir pow strchr strdup strstr strtol])
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# User defined options: debug, lto
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AC_ARG_ENABLE([debug],
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[AS_HELP_STRING([--enable-debug],[compile with debug options])],
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[debug=${enableval}], [debug=no])
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AC_ARG_ENABLE([lto],
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[AS_HELP_STRING([--disable-lto], [disable link time optimization])],
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[lto=${enableval}], [lto=yes])
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AC_MSG_NOTICE([Setting up compiler flags])
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CFLAGS+=" -Wall -Wpedantic -Wextra"
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if test x$debug = xyes; then
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CFLAGS+=" -O0"
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CFLAGS+=" -g -g3 -gdwarf-2"
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CFLAGS+=" -ftrapv"
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CPPFLAGS+="-DDEBUG"
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YFLAGS+=" --debug -v"
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lto=no
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else
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CFLAGS+=" -O3"
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CPPFLAGS+=" -DNDEBUG"
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CFLAGS+=" -fomit-frame-pointer"
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AX_CHECK_COMPILE_FLAG([-finline-limit=1000000 ],
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[ CFLAGS+=" -finline-limit=1000000" ])
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fi
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if test x$lto = xyes; then
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AX_CHECK_COMPILE_FLAG([-flto],
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[ CFLAGS+=" -flto" ],
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[ AC_MSG_WARN([C compiler doesn't support link time optimization])] )
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fi
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AC_CONFIG_FILES([Makefile src/Makefile])
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AC_OUTPUT
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AS_ECHO("")
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AS_ECHO("")
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AS_ECHO("Configuration summary")
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AS_ECHO("CC = $CC")
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AS_ECHO("CFLAGS = $CFLAGS")
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AS_ECHO("CPPLAGS = $CPPFLAGS")
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AS_ECHO("YFLAGS = $YFLAGS")
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AS_ECHO("LFLAGS = $LFLAGS")
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# ===========================================================================
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# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
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#
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# DESCRIPTION
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#
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# Check whether the given FLAG works with the current language's compiler
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# or gives an error. (Warnings, however, are ignored)
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#
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# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
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# success/failure.
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#
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# If EXTRA-FLAGS is defined, it is added to the current language's default
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# flags (e.g. CFLAGS) when the check is done. The check is thus made with
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# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
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# force the compiler to issue an error when a bad flag is given.
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#
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# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
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#
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# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
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# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
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# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 6
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AC_DEFUN([AX_CHECK_COMPILE_FLAG],
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[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
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AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
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AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
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ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
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_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
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AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
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[AS_VAR_SET(CACHEVAR,[yes])],
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[AS_VAR_SET(CACHEVAR,[no])])
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_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
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AS_VAR_IF(CACHEVAR,yes,
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[m4_default([$2], :)],
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[m4_default([$3], :)])
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AS_VAR_POPDEF([CACHEVAR])dnl
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])dnl AX_CHECK_COMPILE_FLAGS
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NULL =
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bin_PROGRAMS = hvif
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# veriT configuration
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hvif_CPPFLAGS = \
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$(AM_CPPFLAGS) \
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-I$(top_builddir)/src \
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$(NULL)
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hvif_LDADD = \
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$(AM_LDADD) \
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-lm \
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$(NULL)
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hvif_SOURCES = \
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$(BUILT_SOURCES) \
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src/main.c \
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src/hvif-light.c \
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src/hvif-light.h \
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$(NULL)
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#include "hvif-light.h"
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unsigned test(unsigned x) {
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return 2*x;
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}
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#ifndef HVIF_LIGHT_H
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#define HVIF_LIGHT_H
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unsigned test(unsigned x);
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#endif // HVIF_LIGHT_H
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#include <stdio.h>
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#include <stdlib.h>
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#include "config.h"
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#include "hvif-light.h"
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int main(void) {
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unsigned x = 12;
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unsigned y = test(x);
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printf("This is " PACKAGE_STRING " and 2*%u = %u.\n", x, y);
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return EXIT_SUCCESS;
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}
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