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| author | Marti Bolivar <mbolivar@leaflabs.com> | 2012-06-06 18:06:48 -0400 |
|---|---|---|
| committer | Marti Bolivar <mbolivar@leaflabs.com> | 2012-06-07 03:44:31 -0400 |
| commit | 5838b447f675444b154bacd205ebf9f47d003b2f (patch) | |
| tree | 004d9d4871e5d70f248646d65450952b2fa79aff /Makefile | |
| parent | 42570013c5266449f7e8512a77fe66b8e852294d (diff) | |
| download | librambutan-5838b447f675444b154bacd205ebf9f47d003b2f.tar.gz librambutan-5838b447f675444b154bacd205ebf9f47d003b2f.zip | |
Rework linker scripts.
Having separate linker scripts for all the boards is a bad idea. Most
boards really only need to specify MEMORY and the appropriate
REGION_ALIASES() so that support/ld/common.inc can do its work. Not
having infrastructure for this leads to duplication -- viz. the Maple
Mini linker scripts are identical to the Maple's, and the
olimex_stm32_h103 linker directory is just a symlink to
Maple's. Clearly, the current structure is wrong.
To fix it, instead of having per-board subdirectories of support/ld/,
add per-MEMORY subdirectories of (new) support/ld/stm32/mem/. The
per-board .mk files under support/mk/board-includes/ now reference
these directly, and target-config.mk and the Makefile handle this
appropriately. We move some other stuff around in target-config.mk to
make this all more convenient, and even allow more overriding of the
libmaple defaults on a per-board basis. Custom board hacks will be
easier now.
Unfortunately, lots of duplication under support/ld/stm32/mem/ is
necessary, as the LENGTH attribute in a MEMORY region specification
doesn't support arithmetic expressions, and ld doesn't seem to have
any way to specify MEMORY at the command line (why?!). If we find a
better way than this, we should do it.
If a board (e.g. Maple Native) _does_ really need special
memory-related configuration, you can always put a per-board
subdirectory of support/ld/stm32/mem. We do this here to configure the
heap.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 3 |
1 files changed, 1 insertions, 2 deletions
@@ -51,8 +51,7 @@ GLOBAL_CFLAGS := -Os -g3 -gdwarf-2 -mcpu=cortex-m3 -mthumb -march=armv7-m \ GLOBAL_CXXFLAGS := -fno-rtti -fno-exceptions -Wall $(TARGET_FLAGS) GLOBAL_ASFLAGS := -mcpu=cortex-m3 -march=armv7-m -mthumb \ -x assembler-with-cpp $(TARGET_FLAGS) -LDFLAGS = -T$(LDDIR)/$(LDSCRIPT) -L$(LDDIR) \ - -mcpu=cortex-m3 -mthumb -Xlinker -L $(LD_SERIES_PATH) \ +LDFLAGS = $(TARGET_LDFLAGS) -mcpu=cortex-m3 -mthumb -Xlinker \ --gc-sections --print-gc-sections --march=armv7-m -Wall ## |