forked from Mirrors/freeswitch
5c259f26d2
Various little tweaks to spandsp to bring it into line with the master versions Addition of Ademco Contact ID protocol processing to spandsp
34 lines
1.4 KiB
Plaintext
34 lines
1.4 KiB
Plaintext
# AX_MISALIGNED_ACCESS_FAILS(MACHINE, [ACTION-IF-MISALIGNED-FAILS], [ACTION-IF-MISALIGNED-OK])
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# -------------------------------------------------------------------------------------
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#
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# Check if a specified machine type cannot handle misaligned data. That is, multi-byte data
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# types which are not properly aligned in memory fail. Many machines are happy to work with
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# misaligned data, but slowing down a bit. Other machines just won't tolerate such data.
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#
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# This is a simple lookup amongst machines known to the current autotools. So far we only deal
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# with the ARM and sparc.
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# A lookup is used, as many of the devices which cannot handled misaligned access are embedded
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# processors, for which the code normally be cross-compiled.
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#
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AC_DEFUN([AX_MISALIGNED_ACCESS_FAILS],
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[AS_VAR_PUSHDEF([ac_MisalignedAccessFails], [ac_cv_misaligned_access_fails_$1])dnl
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AC_CACHE_CHECK([if $1 fails on misaligned memory access], ac_MisalignedAccessFails,
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[case $1 in
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arc | arm | arm[bl]e | arme[lb] | armv[2345] | armv[345][lb] \
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| bfin \
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| sparc \
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| xscale | xscalee[bl] \
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| arm-* | armbe-* | armle-* | armeb-* | armv*-* \
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| bfin-* \
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| sparc-* \
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| xscale-* | xscalee[bl]-* )
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AS_VAR_SET(ac_MisalignedAccessFails, yes)
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;;
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*)
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AS_VAR_SET(ac_MisalignedAccessFails, no)
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;;
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esac])
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AS_IF([test AS_VAR_GET(ac_MisalignedAccessFails) = yes], [$2], [$3])[]dnl
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AS_VAR_POPDEF([ac_MisalignedAccessFails])dnl
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])# MISALIGNED_ACCESS_FAILS
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