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Global: Allow overriding float-abi flags

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We currently default to "-mfloat-abi=hard -mfpu=fpv4-sp-d16" for M4F cores, and
and variations of "-mfloat-abi=soft" for the others. Keep the M4F default, and
move others to no FP flags for consistency, but allow overriding these flags
via the FP_FLAGS environment variable.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
This commit is contained in:
Alexandru Gagniuc 2013-06-10 11:42:21 -05:00 committed by Piotr Esden-Tempski
parent 63d150008a
commit 52d34c814b
17 changed files with 55 additions and 33 deletions
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18
README
View File

@ -44,7 +44,7 @@ For Fedora
$ [sudo] yum install PyYAML
For Windows
Download and install:
Download and install:
msys - sourceforge.net/projects/mingw/files/MSYS/Base/msys-core/msys-1.0.11/MSYS-1.0.11.exe
Python - http://www.python.org/ftp/python/2.7/python-2.7.msi (use installer to get the right registry keys for PyYAML)
PyYAML - http://pyyaml.org/download/pyyaml/PyYAML-3.10.win32-py2.7.exe
@ -66,6 +66,22 @@ For a more verbose build you can use
$ make V=1
Fine-tuning the build
---------------------
The build may be fine-tuned with a limited number of parameters, by specifying
them as environment variables, for example:
$ VARIABLE=value make
* FP_FLAGS - Control the floating-point ABI
If the Cortex-M core supports a hard float ABI, it will be compiled with
floating-point support by default. In cases where this is not desired, the
behavior can be specified by setting FP_FLAGS. Currently, M4F cores default
to "-mfloat-abi=hard -mfpu=fpv4-sp-d16" and others to no FP flags
Examples:
$ FP_FLAGS="-mfloat-abi=soft" make # No hardfloat
$ FP_FLAGS="-mfloat-abi=hard -mfpu=magic" make # New FPU we don't know of
Example projects
----------------

2
lib/efm32/efm32g/Makefile
View File

@ -30,7 +30,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 $(FP_FLAGS) -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -D$(FAMILY)
# ARFLAGS = rcsv
ARFLAGS = rcs

2
lib/efm32/efm32gg/Makefile
View File

@ -30,7 +30,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 $(FP_FLAGS) -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -D$(FAMILY)
# ARFLAGS = rcsv
ARFLAGS = rcs

2
lib/efm32/efm32lg/Makefile
View File

@ -30,7 +30,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 $(FP_FLAGS) -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -D$(FAMILY)
# ARFLAGS = rcsv
ARFLAGS = rcs

2
lib/efm32/efm32tg/Makefile
View File

@ -30,7 +30,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 $(FP_FLAGS) -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -D$(FAMILY)
# ARFLAGS = rcsv
ARFLAGS = rcs

4
lib/lm3s/Makefile
View File

@ -20,7 +20,7 @@
LIBNAME = libopencm3_lm3s
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,7 +28,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DLM3S
# ARFLAGS = rcsv
ARFLAGS = rcs

6
lib/lm4f/Makefile
View File

@ -2,6 +2,7 @@
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
## Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
@ -19,8 +20,9 @@
LIBNAME = libopencm3_lm4f
FP_FLAGS ?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,7 +30,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../include -fno-common \
-mcpu=cortex-m4 -mthumb -mfloat-abi=hard -Wstrict-prototypes \
-mcpu=cortex-m4 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DLM4F
# ARFLAGS = rcsv
ARFLAGS = rcs

4
lib/lpc13xx/Makefile
View File

@ -20,7 +20,7 @@
LIBNAME = libopencm3_lpc13xx
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,7 +28,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DLPC13XX
# ARFLAGS = rcsv
ARFLAGS = rcs

4
lib/lpc17xx/Makefile
View File

@ -20,7 +20,7 @@
LIBNAME = libopencm3_lpc17xx
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -O0 -g \
@ -28,7 +28,7 @@ CFLAGS = -O0 -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DLPC17XX
# ARFLAGS = rcsv
ARFLAGS = rcs

8
lib/lpc43xx/m4/Makefile
View File

@ -4,6 +4,7 @@
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
## Copyright (C) 2012 Michael Ossmann <mike@ossmann.com>
## Copyright (C) 2012 Benjamin Vernoux <titanmkd@gmail.com>
## Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
@ -21,8 +22,9 @@
LIBNAME = libopencm3_lpc43xx
FP_FLAGS ?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -O2 -g3 \
@ -32,8 +34,8 @@ CFLAGS = -O2 -g3 \
-I../../../include -fno-common \
-mcpu=cortex-m4 -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD \
-mfloat-abi=hard -mfpu=fpv4-sp-d16 -DLPC43XX -DLPC43XX_M4
# ARFLAGS = rcsv
$(FP_FLAGS) -DLPC43XX -DLPC43XX_M4
ARFLAGS = rcs
# LPC43xx common files for M4 / M0

4
lib/sam/3n/Makefile
View File

@ -20,11 +20,11 @@
LIBNAME = libopencm3_sam3n
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g -Wall -Wextra -I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSAM3N
# ARFLAGS = rcsv
ARFLAGS = rcs

4
lib/sam/3x/Makefile
View File

@ -20,11 +20,11 @@
LIBNAME = libopencm3_sam3x
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g -Wall -Wextra -I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSAM3X
# ARFLAGS = rcsv
ARFLAGS = rcs

4
lib/stm32/f1/Makefile
View File

@ -20,7 +20,7 @@
LIBNAME = libopencm3_stm32f1
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,7 +28,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m3 -msoft-float -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 $(FP_FLAGS) -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSTM32F1
# ARFLAGS = rcsv
ARFLAGS = rcs

6
lib/stm32/f2/Makefile
View File

@ -19,8 +19,8 @@
LIBNAME = libopencm3_stm32f2
PREFIX ?= arm-none-eabi
# PREFIX ?= arm-elf
PREFIX ?= arm-none-eabi
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,7 +28,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSTM32F2
# ARFLAGS = rcsv
ARFLAGS = rcs

8
lib/stm32/f3/Makefile
View File

@ -19,8 +19,9 @@
LIBNAME = libopencm3_stm32f3
FP_FLAGS ?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
PREFIX ?= arm-none-eabi
# PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,10 +29,9 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 \
-Wstrict-prototypes \
-mcpu=cortex-m4 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSTM32F3
# ARFLAGS = rcsv
ARFLAGS = rcs
OBJS = rcc.o gpio.o adc.o exti.o i2c.o spi.o usart.o

6
lib/stm32/f4/Makefile
View File

@ -2,6 +2,7 @@
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
## Copyright (C) 2013 Alexandru Gagniuc <mr.nuke.me@gmail.com>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
@ -19,8 +20,9 @@
LIBNAME = libopencm3_stm32f4
FP_FLAGS ?= -mfloat-abi=hard -mfpu=fpv4-sp-d16
PREFIX ?= arm-none-eabi
# PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,7 +30,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 \
-mcpu=cortex-m4 -mthumb $(FP_FLAGS) \
-Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSTM32F4
# ARFLAGS = rcsv

4
lib/stm32/l1/Makefile
View File

@ -20,7 +20,7 @@
LIBNAME = libopencm3_stm32l1
PREFIX ?= arm-none-eabi
#PREFIX ?= arm-elf
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -g \
@ -28,7 +28,7 @@ CFLAGS = -Os -g \
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes \
-Wundef -Wshadow \
-I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb -Wstrict-prototypes \
-mcpu=cortex-m3 $(FP_FLAGS) -mthumb -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSTM32L1
# ARFLAGS = rcsv
ARFLAGS = rcs