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######################################################################## |
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# |
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# configure.host -- JACK Audio Connection Kit version. |
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# |
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# This script and the system-dependent header directories it uses were |
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# adapted for JACK from gcc/libstdc++-v3/configure.host. |
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# |
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# We've tried to keep it as close to the original as possible, while |
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# removing a bunch of os-specific files that didn't seem relevant. |
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# The primary goal has been to avoid changing the cpu-dependent |
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# atomicity.h headers. |
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# |
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# If you need to make changes, the relevant GCC documentation may |
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# prove helpful, <http://gcc.gnu.org/onlinedocs/porting>, especially |
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# the <http://gcc.gnu.org/onlinedocs/porting/Thread-safety.html> |
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# discussion of <atomicity.h>. |
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# |
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######################################################################## |
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# This shell script handles all host based configuration for libstdc++. |
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# It sets various shell variables based on the the host and the |
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# configuration options. You can modify this shell script without needing |
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# to rerun autoconf/aclocal/etc. This file is "sourced" not executed. |
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# |
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# You should read docs/html/17_intro/porting.* to make sense of this file. |
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# |
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# |
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# It uses the following shell variables as set by config.guess: |
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# host The configuration host (full CPU-vendor-OS triplet) |
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# host_cpu The configuration host CPU |
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# host_os The configuration host OS |
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# |
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# |
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# It sets the following shell variables: |
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# |
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# cpu_include_dir CPU-specific directory, defaults to cpu/generic |
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# if cpu/host_cpu doesn't exist. This is |
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# used to set atomicity_include_dir. |
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# |
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# os_include_dir OS-specific directory, defaults to os/generic. |
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# |
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# atomicity_include_dir location of atomicity.h, |
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# defaults to cpu_include_dir |
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# |
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# It possibly modifies the following variables: |
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# |
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# OS_LDFLAGS extra flags to pass when linking the library, of |
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# the form '-Wl,blah' |
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# (defaults to empty in acinclude.m4) |
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# |
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# If the defaults will not work for your platform, you need only change the |
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# variables that won't work, i.e., you do not need to explicitly set a |
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# working variable to its default. Most hosts only need to change the two |
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# *_include_dir variables. |
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# DEFAULTS |
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# Try to guess a default cpu_include_dir based on the name of the CPU. We |
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# cannot do this for os_include_dir; there are too many portable operating |
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# systems out there. :-) |
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# HOST-SPECIFIC OVERRIDES |
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# Set any CPU-dependent bits. |
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# Here we override defaults and catch more general cases due to naming |
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# conventions (e.g., chip_name* to catch all variants). |
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# THIS TABLE IS SORTED. KEEP IT THAT WAY. |
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case "${host_cpu}" in |
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alpha*) |
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try_cpu=alpha |
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;; |
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i[3567]86 | x86_64 | amd64) |
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# Note that this causes us to compile i386 using i486 |
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# instructions. This is done for binary distributions, which |
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# typically compile for i386 as the lowest common denominator. |
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# Since JACK is unlikely to actually be used on a real i386, we |
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# substitute i486 as our common denominator. That way the atomic |
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# instructions work properly. |
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try_cpu=i486 |
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;; |
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hppa*) |
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try_cpu=hppa |
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;; |
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mips*) |
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# NB: cpu/mips/atomicity.h needs MIPS II or above. |
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# Of course, there is no sane way to test for this, no ABI macro, |
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# and no consistent host_cpu name differentiation. Therefore, only |
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# use it where it is known to be safe, ie it runs linux (see below). |
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try_cpu=generic |
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;; |
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m680[246]0) |
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try_cpu=m68k |
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;; |
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powerpc* | rs6000) |
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try_cpu=powerpc |
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;; |
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s390x) |
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try_cpu=s390 |
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;; |
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sparc* | ultrasparc) |
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try_cpu=sparc |
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;; |
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*) |
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if test -d $srcdir/config/cpu/${host_cpu}; then |
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try_cpu=${host_cpu} |
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else |
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try_cpu=generic |
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fi |
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;; |
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esac |
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# set the CPU that will be used to select atomicity functionality |
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ATOMICITY_TARGET=${try_cpu} |
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# Set any OS-dependent bits. |
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# Set the os_include_dir. |
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# If atomic ops and/or numeric limits are OS-specific rather than |
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# CPU-specifc, set those here too. |
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# THIS TABLE IS SORTED. KEEP IT THAT WAY. |
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case "${host_os}" in |
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aix4.[3456789]* | aix[56789]*) |
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# We set os_include_dir to os/aix only on AIX 4.3 and newer, but |
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# os/aix/atomicity.h works on earlier versions of AIX 4.*, so we |
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# explicitly duplicate the directory for 4.[<3]. |
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OSPLATFORM="AIX" |
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ATOMICITY_TARGET="AIX" |
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OS_LDFLAGS="-Wl,-G" |
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;; |
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aix4.*) |
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OSPLATFORM="GENERIC" |
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ATOMICITY_TARGET="AIX" |
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;; |
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aix*) |
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OSPLATFORM="GENERIC" |
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ATOMICITY_TARGET="GENERIC" |
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;; |
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gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) |
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OSPLATFORM="GNULINUX" |
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;; |
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freebsd*) |
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# current FreeBSD header files conflict with the OSS driver's |
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# barrier code, this may be fixed in 5.3, stay tuned. |
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OSPLATFORM="GENERIC" |
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USE_BARRIER="no" |
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;; |
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irix*) |
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OSPLATFORM="IRIX" |
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ATOMICITY_TARGET="IRIX" |
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;; |
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darwin*) |
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OSPLATFORM="MACOSX" |
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JACK_THREAD_STACK_TOUCH=10000 # need small realtime stack |
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JACK_CPP_VARARGS_BROKEN=1 |
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JACK_DO_NOT_MLOCK=1 |
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JACK_USE_MACH_THREADS=1 |
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OS_LDFLAGS="-framework CoreAudio -framework CoreServices -framework AudioUnit" |
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TRY_POSIX_SHM=yes # POSIX shm works better |
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;; |
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*) |
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OSPLATFORM="GENERIC" |
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;; |
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esac |
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# Set any OS-dependent and CPU-dependent bits. |
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# THIS TABLE IS SORTED. KEEP IT THAT WAY. |
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case "${host}" in |
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mips*-*-linux*) |
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atomicity_include_dir="cpu/mips" |
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;; |
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esac |