ref: 06a021bb7ab5a85975a6e27b7cc5255768df3666
dir: /configure.ac/
# Copyright (C) 2002-2017 Erik de Castro Lopo (erikd AT mega-nerd DOT com).
dnl Require autoconf version >= 2.69)
AC_PREREQ([2.69])
AC_INIT([libsamplerate],[0.1.9],[erikd@mega-nerd.com],
[libsamplerate],[https://github.com/libsndfile/libsamplerate/])
dnl Check whether we want to set defaults for CFLAGS, CPPFLAGS and LDFLAGS
AC_MSG_CHECKING([whether configure should try to set CFLAGS/CPPFLAGS/LDFLAGS])
AS_IF([test "x${CFLAGS+set}" = "xset" || test "x${CPPFLAGS+set}" = "xset" || test "x${LDFLAGS+set}" = "xset"], [
enable_flags_setting=no
: ${CFLAGS=""}
], [
enable_flags_setting=yes
dnl Set to empty flags so AC_PROG_CC does not add -g -O2
CFLAGS=""
])
AC_MSG_RESULT([${enable_flags_setting}])
dnl Put config stuff in 'build-aux'.
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_SRCDIR([src/samplerate.c])
AC_CANONICAL_HOST
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_HEADERS([src/config.h])
AM_INIT_AUTOMAKE([1.14 foreign dist-bzip2 no-dist-gzip subdir-objects])
AM_SILENT_RULES([yes])
dnl ====================================================================================
AC_PROG_CC
AC_PROG_CC_C99
AS_IF([test "x$ac_cv_prog_cc_c99" = "xno"], [
AC_MSG_ERROR([libsamplerate requires a C99 capable compiler!])
])
AC_LANG([C])
AX_COMPILER_VENDOR
AX_COMPILER_VERSION
AC_PROG_SED
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P
PKG_PROG_PKG_CONFIG
dnl Catch ancient versions of pkg-config below 0.27
AX_REQUIRE_DEFINED([PKG_INSTALLDIR])
PKG_INSTALLDIR
LT_INIT
LT_PROG_RC
dnl ====================================================================================
dnl Rules for library version information:
dnl
dnl 1. Start with version information of `0:0:0' for each libtool library.
dnl 2. Update the version information only immediately before a public release of
dnl your software. More frequent updates are unnecessary, and only guarantee
dnl that the current interface number gets larger faster.
dnl 3. If the library source code has changed at all since the last update, then
dnl increment revision (`c:r:a' becomes `c:r+1:a').
dnl 4. If any interfaces have been added, removed, or changed since the last update,
dnl increment current, and set revision to 0.
dnl 5. If any interfaces have been added since the last public release, then increment
dnl age.
dnl 6. If any interfaces have been removed since the last public release, then set age
dnl to 0.
CLEAN_VERSION=`echo $PACKAGE_VERSION | $SED "s/p.*//"`
VERSION_MINOR=`echo $CLEAN_VERSION | $SED "s/.*\.//"`
SHARED_VERSION_INFO="1:$VERSION_MINOR:1"
dnl ====================================================================================
AC_HEADER_STDC
AC_CHECK_HEADERS([stdbool.h stdint.h sys/times.h])
dnl ====================================================================================
dnl Couple of initializations here. Fill in real values later.
SHLIB_VERSION_ARG=""
dnl ====================================================================================
dnl Finished checking, handle options.
AC_ARG_ENABLE([werror],
[AS_HELP_STRING([--enable-werror], [enable -Werror in all Makefiles])])
AC_ARG_ENABLE([cpu-clip],
[AS_HELP_STRING([--disable-cpu-clip], [disable tricky cpu specific clipper])])
AC_ARG_ENABLE([sndfile],
[AS_HELP_STRING([--disable-sndfile], [disable support for sndfile (default=autodetect)])], [], [enable_sndfile=auto])
AC_ARG_ENABLE([alsa],
[AS_HELP_STRING([--disable-alsa], [disable ALSA support in the varispeed-play example program (default=autodetect)])], [], [enable_alsa=auto])
AC_ARG_ENABLE([fftw],
[AS_HELP_STRING([--disable-fftw], [disable usage of FFTW (default=autodetect)])], [], [enable_fftw=auto])
dnl ====================================================================================
dnl Check types and their sizes.
AC_CHECK_SIZEOF(int,0)
AC_CHECK_SIZEOF(long,0)
AC_CHECK_SIZEOF(float,4)
AC_CHECK_SIZEOF(double,8)
dnl ====================================================================================
dnl Determine endian-ness of host processor.
AC_C_BIGENDIAN([
dnl big-endian
ac_cv_c_big_endian=1
ac_cv_c_little_endian=0
], [
dnl little-endian
ac_cv_c_big_endian=0
ac_cv_c_little_endian=1
])
AC_DEFINE_UNQUOTED([CPU_IS_BIG_ENDIAN], [${ac_cv_c_big_endian}], [Host processor is big endian.])
AC_DEFINE_UNQUOTED([CPU_IS_LITTLE_ENDIAN], [${ac_cv_c_little_endian}], [Host processor is little endian.])
dnl ====================================================================================
dnl Check for functions.
AC_CHECK_FUNCS([malloc calloc free memcpy memmove alarm signal])
AC_SEARCH_LIBS([floor], [m], [], [
AC_MSG_ERROR([unable to find the floor() function!])
])
AC_CHECK_FUNCS([floor ceil fmod lrint lrintf])
AC_CHECK_SIGNAL(SIGALRM)
dnl ====================================================================================
dnl Determine if the processor can do clipping on float to int conversions.
AS_IF([test "x$enable_cpu_clip" != "xno"], [
AC_C_CLIP_MODE
], [
AS_ECHO(["checking processor clipping capabilities... disabled"])
ac_cv_c_clip_positive=0
ac_cv_c_clip_negative=0
])
AC_DEFINE_UNQUOTED([CPU_CLIPS_POSITIVE], [${ac_cv_c_clip_positive}], [Host processor clips on positive float to int conversion.])
AC_DEFINE_UNQUOTED([CPU_CLIPS_NEGATIVE], [${ac_cv_c_clip_negative}], [Host processor clips on negative float to int conversion.])
dnl ====================================================================================
dnl Check for libsndfile which is required for the test and example programs.
AS_IF([test "x$enable_sndfile" != "xno"], [
PKG_CHECK_MODULES([SNDFILE], [sndfile >= 1.0.6], [
AC_DEFINE([HAVE_SNDFILE], [1], [Set to 1 if you have libsndfile])
enable_sndfile="yes"
], [
AS_IF([test "x$enable_sndfile" = "xyes"], [
dnl explicitly passed --enable-sndfile, hence error out loud and clearly
AC_MSG_ERROR([You explicitly requested libsndfile support, but libsndfile could not be found!])
], [
dnl did not explicitly pass --enable-sndfile, relying on default automagic on
enable_sndfile="no (auto)"
])
])
])
AM_CONDITIONAL([HAVE_LIBSNDFILE], [test "x$enable_sndfile" = "xyes"])
dnl ====================================================================================
dnl Check for ALSA.
AS_IF([test "x$enable_alsa" != "xno"], [
PKG_CHECK_MODULES([ALSA], [alsa], [
AC_DEFINE([HAVE_ALSA], [1], [Set to 1 if you have alsa])
enable_alsa="yes"
], [
AS_IF([test "x$enable_alsa" = "xyes"], [
dnl explicitly passed --enable-alsa, hence error out loud and clearly
AC_MSG_ERROR([You explicitly requested alsa support, but alsa could not be found!])
], [
dnl did not explicitly pass --enable-alsa, relying on default automagic on
enable_alsa="no (auto)"
])
])
])
AM_CONDITIONAL([HAVE_LIBALSA], [test "x$enable_alsa" = "xyes"])
dnl ====================================================================================
dnl Check for libfftw3 which is required for the test and example programs.
AS_IF([test "x$enable_fftw" != "xno"], [
PKG_CHECK_MODULES([FFTW3], [fftw3 >= 3.0.0], [
AC_DEFINE([HAVE_FFTW3], [1], [Set to 1 if you have fftw3])
enable_fftw="yes"
], [
AS_IF([test "x$enable_fftw" = "xyes"], [
dnl explicitly passed --enable-fftw, hence error out loud and clearly
AC_MSG_ERROR([You explicitly requested FFTW3 support, but FFTW3 could not be found!])
], [
dnl did not explicitly pass --enable-fftw, relying on default automagic on
enable_fftw="no (auto)"
])
])
])
dnl ====================================================================================
dnl Compiler stuff.
AS_IF([test "x$enable_flags_setting" = "xyes"], [
AX_APPEND_COMPILE_FLAGS([-DHAVE_CONFIG_H -O2 -pipe -DNDEBUG], [CFLAGS])
AS_CASE([${host_os}],
[darwin*], [
ldflags_test="-Wl,-dead_strip_dylibs"],
[linux*], [
ldflags_test="-Wl,-O1 -Wl,--as-needed -Wl,--no-undefined -Wl,--gc-sections"]
)
AX_APPEND_LINK_FLAGS([${ldflags_test}], [LDFLAGS])
])
AS_IF([test "x$enable_werror" = "xyes"], [
AX_APPEND_COMPILE_FLAGS([-Werror], [CFLAGS])
])
AX_APPEND_COMPILE_FLAGS([-W -Wstrict-prototypes -Wmissing-prototypes -Wall -Waggregate-return -Wcast-align -Wcast-qual -Wnested-externs -Wshadow -Wpointer-arith -Wshorten-64-to-32], [CFLAGS])
dnl ====================================================================================
dnl GCC stuff.
AS_IF([test "x$ax_cv_c_compiler_vendor" = "xgnu"], [
# OS specific tweaks.
AS_CASE([${host_os}],
[mingw*|cygwin*], [
SHLIB_VERSION_ARG="-export-symbols \$(top_builddir)/Win32/libsamplerate-0.def"],
[darwin*], [dnl lots of warnings from xxx_coeff.h, otherwise:
temp_CFLAGS=`echo $CFLAGS | sed "s/-Wshorten-64-to-32//"`
CFLAGS=$temp_CFLAGS],
[linux*|kfreebsd*-gnu*|gnu*], [
SHLIB_VERSION_ARG="-Wl,--version-script=\$(top_builddir)/src/Version_script"
])
])
dnl ====================================================================================
dnl Find known host OS.
OS_SPECIFIC_INCLUDES=""
os_is_win32=0
AS_CASE([${host_os}],
[darwin* | rhapsody*], [
OS_SPECIFIC_INCLUDES="-fpascal-strings -I/Developer/Headers/FlatCarbon"
OS_SPECIFIC_LINKS="-framework CoreAudio"],
[mingw32*], [
OS_SPECIFIC_LINKS="-lwinmm"
os_is_win32=1],
[
OS_SPECIFIC_INCLUDES=""
OS_SPECIFIC_LINKS=""
])
dnl ====================================================================================
dnl Now use the information from the checking stage.
AC_DEFINE_UNQUOTED([OS_IS_WIN32], [${os_is_win32}], [Set to 1 if compiling for Win32])
AC_SUBST(SHLIB_VERSION_ARG)
AC_SUBST(SHARED_VERSION_INFO)
AC_SUBST(OS_SPECIFIC_INCLUDES)
AC_SUBST(OS_SPECIFIC_LINKS)
AC_CONFIG_FILES([
Makefile
src/Version_script
libsamplerate.spec
samplerate.pc
])
AC_OUTPUT
dnl ====================================================================================
AX_RECURSIVE_EVAL([$libdir], [full_absolute_libdir])
AX_RECURSIVE_EVAL([$bindir], [full_absolute_bindir])
AX_RECURSIVE_EVAL([$pkgconfigdir], [full_absolute_pkgconfigdir])
AX_RECURSIVE_EVAL([$htmldir], [full_absolute_htmldir])
AC_MSG_RESULT([
-=-=-=-=-=-=-=-=-=-= Configuration Complete =-=-=-=-=-=-=-=-=-=-=-
Configuration summary :
libsamplerate version : ............... ${VERSION}
Host CPU : ............................ ${host_cpu}
Host Vendor : ......................... ${host_vendor}
Host OS : ............................. ${host_os}
CFLAGS : .............................. ${CFLAGS}
CPPFLAGS : ............................ ${CPPFLAGS}
LDFLAGS : ............................. ${LDFLAGS}
Tools :
C Compiler Vendor is : ................ ${ax_cv_c_compiler_vendor} (${ax_cv_c_compiler_version})
Extra tools required for testing and examples :
Have libsndfile : ..................... ${enable_sndfile}
Have ALSA : ........................... ${enable_alsa}
Have FFTW : ........................... ${enable_fftw}
Installation directories :
Library directory : ................... ${full_absolute_libdir}
Program directory : ................... ${full_absolute_bindir}
Pkgconfig directory : ................. ${full_absolute_pkgconfigdir}
HTML docs directory : ................. ${full_absolute_htmldir}
Compiling some other packages against libsamplerate may require
the addition of '$full_absolute_pkgconfigdir' to the
PKG_CONFIG_PATH environment variable.
])