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am e0b505d4: Merge change 1958 into donut

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Merge commit 'e0b505d438fc72c6a092ca85cce434b54d033a27'

* commit 'e0b505d438fc72c6a092ca85cce434b54d033a27':
  Force --no-undefined at link time to generate an error when trying to generate a shared library that references undefined symbols.
This commit is contained in:
Android (Google) Code Review
2009-05-19 14:03:50 -07:00
committed by The Android Open Source Project
parent 60daa0442a e0b505d438
commit 94970f09f3
4 changed files with 22 additions and 0 deletions
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8
ndk/build/core/build-binary.mk
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@@ -54,6 +54,14 @@ else
endif
endif
#
# If LOCAL_ALLOW_UNDEFINED_SYMBOLS, the linker will allow the generation
# of a binary that uses undefined symbols.
#
ifeq ($(strip $(LOCAL_ALLOW_UNDEFINED_SYMBOLS)),)
LOCAL_LDFLAGS := $(LOCAL_LDFLAGS) $($(my)NO_UNDEFINED_LDFLAGS)
endif
#
# The original Android build system allows you to use the .arm prefix
# to a source file name to indicate that it should be defined in either

1
ndk/build/core/clear-vars.mk
View File

@@ -27,6 +27,7 @@ NDK_LOCAL_VARS := \
LOCAL_STATIC_WHOLE_LIBRARIES \
LOCAL_SHARED_LIBRARIES \
LOCAL_MAKEFILE \
LOCAL_NO_UNDEFINED_SYMBOLS \
$(call clear-vars, $(NDK_LOCAL_VARS))

4
ndk/build/toolchains/arm-eabi-4.2.1/setup.mk
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@@ -76,6 +76,10 @@ TARGET_ARFLAGS := crs
TARGET_LIBGCC := $(shell $(TARGET_CC) -mthumb-interwork -print-libgcc-file-name)
TARGET_LDLIBS := -Wl,-rpath-link=$(SYSROOT)/usr/lib $(TARGET_LIBGCC)
# These flags are used to ensure that a binary doesn't reference undefined
# flags.
TARGET_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
# The ABI-specific sub-directory that the SDK tools recognize for
# this toolchain's generated binaries
TARGET_ABI_SUBDIR := armeabi

9
ndk/docs/ANDROID-MK.TXT
View File

@@ -352,3 +352,12 @@ LOCAL_SHARED_LIBRARIES
Note that this does not append the listed modules to the build graph,
i.e. you should still add them to your application's required modules
in your Application.mk
LOCAL_ALLOW_UNDEFINED_SYMBOLS
By default, any undefined reference encountered when trying to build
a shared library will result in an "undefined symbol" error. This is a
great help to catch bugs in your source code.
However, if for some reason you need to disable this check, set this
variable to 'true'. Note that the corresponding shared library may fail
to load at runtime.