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-rw-r--r--build/autoconf/arch.m4254
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diff --git a/build/autoconf/arch.m4 b/build/autoconf/arch.m4
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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)
+
+])