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| author | Salvatore Cro <salvatore.cro@st.com> | 2010-09-09 15:45:44 +0200 |
|---|---|---|
| committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2010-09-15 12:31:22 +0200 |
| commit | 37eb913ed8c4798b736e678f4dbd9f4a91a68f74 (patch) | |
| tree | 63fc2c1dbb887a043a7291c9c6215d2db7b5ba5a /Rules.mak | |
| parent | 7ac7be14eb4c8927fddffbe01fed74c605bf8597 (diff) | |
| download | uClibc-alpine-37eb913ed8c4798b736e678f4dbd9f4a91a68f74.tar.bz2 uClibc-alpine-37eb913ed8c4798b736e678f4dbd9f4a91a68f74.tar.xz | |
libubacktrace: Provide uClibc with backtrace functions
A new shared object, libubacktrace.so.0 is added to uClibc
to provide backtrace functions to support application self-debugging.
This set of functions requires to dynamically load libgcc_s.so so they
need to call dlopen/dlsym that are provided by libdl. For this reason
they cannot be included into libc.so.0 but are provided by a new library.
User application that wants to use backtrace needs to be compiled with
-fexceptions option and -rdynamic to get full symbols printed and must be
linked against libubacktrace.so
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'Rules.mak')
| -rw-r--r-- | Rules.mak | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -118,7 +118,7 @@ export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL LIBC := libc SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION) - +UBACKTRACE_DSO := libubacktrace.so.$(MAJOR_VERSION) ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),) UCLIBC_LDSO_NAME := ld64-uClibc ARCH_NATIVE_BIT := 64 @@ -528,6 +528,13 @@ link.asneeded = $(if $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it) ifndef ASNEEDED export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)") +ifeq ($(UCLIBC_HAS_BACKTRACE),y) +# Only used in installed libc.so linker script +UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO) +export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)") +else +export UBACKTRACE_ASNEEDED:="" +endif endif # Add a bunch of extra pedantic annoyingly strict checks |