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dnl This Source Code Form is subject to the terms of the Mozilla Public
dnl License, v. 2.0. If a copy of the MPL was not distributed with this
dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
AC_DEFUN([MOZ_ARCH_OPTS],
[
dnl ========================================================
dnl = ARM toolchain tweaks
dnl ========================================================
MOZ_THUMB=toolchain-default
MOZ_THUMB_INTERWORK=toolchain-default
MOZ_FPU=toolchain-default
MOZ_FLOAT_ABI=toolchain-default
MOZ_SOFT_FLOAT=toolchain-default
MOZ_ALIGN=toolchain-default
MOZ_ARG_WITH_STRING(arch,
[ --with-arch=[[type|toolchain-default]]
Use specific CPU features (-march=type). Resets
thumb, fpu, float-abi, etc. defaults when set],
if test -z "$GNU_CC"; then
AC_MSG_ERROR([--with-arch is not supported on non-GNU toolchains])
fi
MOZ_ARCH=$withval)
if test -z "$MOZ_ARCH"; then
dnl Defaults
case "${CPU_ARCH}-${OS_TARGET}" in
arm-Android)
MOZ_THUMB=yes
MOZ_ARCH=armv7-a
MOZ_FPU=vfp
MOZ_FLOAT_ABI=softfp
MOZ_ALIGN=no
;;
arm-Darwin)
MOZ_ARCH=toolchain-default
;;
esac
fi
if test "$MOZ_ARCH" = "armv6" -a "$OS_TARGET" = "Android"; then
MOZ_FPU=vfp
MOZ_FLOAT_ABI=softfp
fi
MOZ_ARG_WITH_STRING(thumb,
[ --with-thumb[[=yes|no|toolchain-default]]]
[ Use Thumb instruction set (-mthumb)],
if test -z "$GNU_CC"; then
AC_MSG_ERROR([--with-thumb is not supported on non-GNU toolchains])
fi
MOZ_THUMB=$withval)
MOZ_ARG_WITH_STRING(thumb-interwork,
[ --with-thumb-interwork[[=yes|no|toolchain-default]]
Use Thumb/ARM instuctions interwork (-mthumb-interwork)],
if test -z "$GNU_CC"; then
AC_MSG_ERROR([--with-thumb-interwork is not supported on non-GNU toolchains])
fi
MOZ_THUMB_INTERWORK=$withval)
MOZ_ARG_WITH_STRING(fpu,
[ --with-fpu=[[type|toolchain-default]]
Use specific FPU type (-mfpu=type)],
if test -z "$GNU_CC"; then
AC_MSG_ERROR([--with-fpu is not supported on non-GNU toolchains])
fi
MOZ_FPU=$withval)
MOZ_ARG_WITH_STRING(float-abi,
[ --with-float-abi=[[type|toolchain-default]]
Use specific arm float ABI (-mfloat-abi=type)],
if test -z "$GNU_CC"; then
AC_MSG_ERROR([--with-float-abi is not supported on non-GNU toolchains])
fi
MOZ_FLOAT_ABI=$withval)
MOZ_ARG_WITH_STRING(soft-float,
[ --with-soft-float[[=yes|no|toolchain-default]]
Use soft float library (-msoft-float)],
if test -z "$GNU_CC"; then
AC_MSG_ERROR([--with-soft-float is not supported on non-GNU toolchains])
fi
MOZ_SOFT_FLOAT=$withval)
case "$MOZ_ARCH" in
toolchain-default|"")
arch_flag=""
;;
*)
arch_flag="-march=$MOZ_ARCH"
;;
esac
case "$MOZ_THUMB" in
yes)
MOZ_THUMB2=1
thumb_flag="-mthumb"
;;
no)
MOZ_THUMB2=
thumb_flag="-marm"
;;
*)
_SAVE_CFLAGS="$CFLAGS"
CFLAGS="$arch_flag"
AC_TRY_COMPILE([],[return sizeof(__thumb2__);],
MOZ_THUMB2=1,
MOZ_THUMB2=)
CFLAGS="$_SAVE_CFLAGS"
thumb_flag=""
;;
esac
if test "$MOZ_THUMB2" = 1; then
AC_DEFINE(MOZ_THUMB2)
fi
case "$MOZ_THUMB_INTERWORK" in
yes)
thumb_interwork_flag="-mthumb-interwork"
;;
no)
thumb_interwork_flag="-mno-thumb-interwork"
;;
*) # toolchain-default
thumb_interwork_flag=""
;;
esac
case "$MOZ_FPU" in
toolchain-default|"")
fpu_flag=""
;;
*)
fpu_flag="-mfpu=$MOZ_FPU"
;;
esac
case "$MOZ_FLOAT_ABI" in
toolchain-default|"")
float_abi_flag=""
;;
*)
float_abi_flag="-mfloat-abi=$MOZ_FLOAT_ABI"
;;
esac
case "$MOZ_SOFT_FLOAT" in
yes)
soft_float_flag="-msoft-float"
;;
no)
soft_float_flag="-mno-soft-float"
;;
*) # toolchain-default
soft_float_flag=""
;;
esac
case "$MOZ_ALIGN" in
no)
align_flag="-mno-unaligned-access"
;;
yes)
align_flag="-munaligned-access"
;;
*)
align_flag=""
;;
esac
if test -n "$align_flag"; then
_SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $align_flag"
AC_MSG_CHECKING(whether alignment flag ($align_flag) is supported)
AC_TRY_COMPILE([],[],,align_flag="")
CFLAGS="$_SAVE_CFLAGS"
fi
dnl Use echo to avoid accumulating space characters
all_flags=`echo $arch_flag $thumb_flag $thumb_interwork_flag $fpu_flag $float_abi_flag $soft_float_flag $align_flag`
if test -n "$all_flags"; then
_SAVE_CFLAGS="$CFLAGS"
CFLAGS="$all_flags"
AC_MSG_CHECKING(whether the chosen combination of compiler flags ($all_flags) works)
AC_TRY_COMPILE([],[return 0;],
AC_MSG_RESULT([yes]),
AC_MSG_ERROR([no]))
CFLAGS="$_SAVE_CFLAGS $all_flags"
CXXFLAGS="$CXXFLAGS $all_flags"
ASFLAGS="$ASFLAGS $all_flags"
if test -n "$thumb_flag"; then
LDFLAGS="$LDFLAGS $thumb_flag"
fi
fi
AC_SUBST(MOZ_THUMB2)
if test "$CPU_ARCH" = "arm"; then
NEON_FLAGS="-mfpu=neon"
AC_MSG_CHECKING(for ARM SIMD support in compiler)
# We try to link so that this also fails when
# building with LTO.
AC_TRY_LINK([],
[asm("uqadd8 r1, r1, r2");],
result="yes", result="no")
AC_MSG_RESULT("$result")
if test "$result" = "yes"; then
AC_DEFINE(HAVE_ARM_SIMD)
HAVE_ARM_SIMD=1
fi
AC_MSG_CHECKING(ARM version support in compiler)
dnl Determine the target ARM architecture (5 for ARMv5, v5T, v5E, etc.; 6 for ARMv6, v6K, etc.)
ARM_ARCH=`${CC-cc} ${CFLAGS} -dM -E - < /dev/null | sed -n 's/.*__ARM_ARCH_\([[0-9]][[0-9]]*\).*/\1/p'`
AC_MSG_RESULT("$ARM_ARCH")
AC_MSG_CHECKING(for ARM NEON support in compiler)
# We try to link so that this also fails when
# building with LTO.
AC_TRY_LINK([],
[asm(".fpu neon\n vadd.i8 d0, d0, d0");],
result="yes", result="no")
AC_MSG_RESULT("$result")
if test "$result" = "yes"; then
AC_DEFINE(HAVE_ARM_NEON)
HAVE_ARM_NEON=1
dnl We don't need to build NEON support if we're targetting a non-NEON device.
dnl This matches media/webrtc/trunk/webrtc/build/common.gypi.
if test -n "$ARM_ARCH"; then
if test "$ARM_ARCH" -lt 7; then
BUILD_ARM_NEON=
else
AC_DEFINE(BUILD_ARM_NEON)
BUILD_ARM_NEON=1
fi
fi
fi
fi # CPU_ARCH = arm
AC_SUBST(HAVE_ARM_SIMD)
AC_SUBST(HAVE_ARM_NEON)
AC_SUBST(BUILD_ARM_NEON)
AC_SUBST(ARM_ARCH)
AC_SUBST_LIST(NEON_FLAGS)
])
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