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Fine-tune compiler flags 

Per default, GCC enables -fdelete-null-pointer-checks, which is
harmful and hence we should disable it:
  "Assume that programs cannot safely dereference null pointers, and
   that no code or data element resides there."

We want to be careful with our stack usage, hence enable
-fconserve-stack:
  "Attempt to minimize stack usage. The compiler will attempt to use
   less stack space, even if that makes the program slower."

Change-Id: I74eac2b07c986553f79898a2f2e57bbead4223f8
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/20883
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Stefan Reinauer 2017-08-04 16:36:21 -07:00 committed by Martin Roth
parent b58366a4c0
commit 7c8d331fbb
1 changed files with 1 additions and 0 deletions
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Makefile.inc
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@ -363,6 +363,7 @@ CFLAGS_common += -Wwrite-strings -Wredundant-decls -Wno-trigraphs
CFLAGS_common += -Wstrict-aliasing -Wshadow -Wdate-time CFLAGS_common += -Wstrict-aliasing -Wshadow -Wdate-time
CFLAGS_common += -fno-common -ffreestanding -fno-builtin -fomit-frame-pointer CFLAGS_common += -fno-common -ffreestanding -fno-builtin -fomit-frame-pointer
CFLAGS_common += -ffunction-sections -fdata-sections -fno-pie CFLAGS_common += -ffunction-sections -fdata-sections -fno-pie
CFLAGS_common += -fno-delete-null-pointer-checks -fconserve-stack
ADAFLAGS_common += -gnatg -gnatp ADAFLAGS_common += -gnatg -gnatp
ADAFLAGS_common += -Wuninitialized -Wall -Werror ADAFLAGS_common += -Wuninitialized -Wall -Werror