This new option adds appropriate -mthumb to target CFLAGS. Then, processors that are thumb-only shall select this option.
Also, remove leading space in Rules.mak. Signed-off-by: "Yann E. MORIN" <yann.morin.1...@anciens.enib.fr> Cc: Khem Raj <raj.k...@gmail.com> Cc: Bernhard Reutner-Fischer <rep.dot....@gmail.com> Cc: Carmelo AMOROSO <carmelo.amor...@st.com> --- Rules.mak | 7 ++++--- extra/Configs/Config.arm | 31 ++++++++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 6 deletions(-) diff --git a/Rules.mak b/Rules.mak index eecdc64..678319e 100644 --- a/Rules.mak +++ b/Rules.mak @@ -348,9 +348,10 @@ ifeq ($(TARGET_ARCH),arm) CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110) CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale - CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt - CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb - CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb + CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt + CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 + CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 + CPU_CFLAGS-$(CONFIG_ARM_MODE_THUMB)+=-mthumb endif ifeq ($(TARGET_ARCH),mips) diff --git a/extra/Configs/Config.arm b/extra/Configs/Config.arm index 3b90e67..297e7ec 100644 --- a/extra/Configs/Config.arm +++ b/extra/Configs/Config.arm @@ -64,70 +64,95 @@ config CONFIG_ARM710 config CONFIG_ARM7TDMI bool "Arm 7TDMI" select ARCH_HAS_NO_MMU + select ARM_HAS_THUMB config CONFIG_ARM720T bool "Arm 720T" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM920T bool "Arm 920T" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM922T bool "Arm 922T" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM926T bool "Arm 926T" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM10T bool "Arm 10T" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM1136JF_S bool "Arm 1136JF-S" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM1176JZ_S bool "Arm 1176JZ-S" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM1176JZF_S bool "Arm 1176JZF-S" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM_CORTEX_M3 bool "Arm Cortex-M3" select ARCH_HAS_NO_MMU - select USE_BX + select ARM_FORCE_THUMB config CONFIG_ARM_CORTEX_M1 bool "Arm Cortex-M1" select ARCH_HAS_NO_MMU - select USE_BX + select ARM_FORCE_THUMB config CONFIG_ARM_SA110 bool "Intel StrongArm SA-110" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM_SA1100 bool "Intel StrongArm SA-1100" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM_XSCALE bool "Intel Xscale" select ARCH_HAS_MMU + select ARM_HAS_THUMB config CONFIG_ARM_IWMMXT bool "Intel Xscale With WMMX PXA27x" select ARCH_HAS_MMU + select ARM_HAS_THUMB endchoice +config ARM_HAS_THUMB + bool + +config ARM_FORCE_THUMB + bool + select ARM_HAS_THUMB + select ARM_MODE_THUMB + select USE_BX + +config ARM_MODE_THUMB + bool + config USE_BX bool "Use BX in function return" default y - depends on !CONFIG_GENERIC_ARM && !CONFIG_ARM610 && !CONFIG_ARM710 + depends on ARM_HAS_THUMB help Use BX instruction for THUMB aware architectures. -- 1.7.1 _______________________________________________ uClibc mailing list uClibc@uclibc.org http://lists.busybox.net/mailman/listinfo/uclibc