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>

1 files changed, 0 insertions, 24 deletions

diff --git a/support/ld/VLDiscovery/flash.ld b/support/ld/VLDiscovery/flash.ld
deleted file mode 100644
index 44ff8a1..0000000
--- a/support/ld/VLDiscovery/flash.ld
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * VLDiscovery (STM32F100RBT6, medium density) linker script for Flash builds.
- */
-
-/*
- * Define memory spaces.
- */
-MEMORY
-{
-  ram (rwx) : ORIGIN = 0x20000000, LENGTH = 8K
-  rom (rx)  : ORIGIN = 0x08000000, LENGTH = 128K
-}
-
-REGION_ALIAS("REGION_TEXT", rom);
-REGION_ALIAS("REGION_DATA", ram);
-REGION_ALIAS("REGION_BSS", ram);
-REGION_ALIAS("REGION_RODATA", rom);
-
-/*
- * Define the rest of the sections
- */
-_FLASH_BUILD = 1;
-
-INCLUDE common.inc