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build system: detect missing crypt and drop it from linking

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2012-03-10 16:30:00 +01:00
parent 79bec06168
commit c528917195
1 changed files with 8 additions and 7 deletions
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15
Makefile.flags
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@ -97,13 +97,6 @@ CFLAGS += $(strip $(subst ",,$(CONFIG_EXTRA_CFLAGS)))
#"))
endif
ifneq ($(CONFIG_CROSS_COMPILER_PREFIX),"arm-linux-androideabi-")
LDLIBS += m crypt
else
# Android libc has no crypt. TODO: make a generic CONFIG_LINK_WITH_CRYPT option?
LDLIBS += m
endif
# Note: both "" (string consisting of two quote chars) and empty string
# are possible, and should be skipped below.
ifneq ($(subst "",,$(CONFIG_SYSROOT)),)
@ -111,6 +104,14 @@ CFLAGS += --sysroot=$(CONFIG_SYSROOT)
export SYSROOT=$(CONFIG_SYSROOT)
endif
# Android has no separate crypt library
CRYPT_AVAILABLE := $(shell echo 'int main(void){return 0;}' | $(CC) $(CFLAGS) $(1) -lcrypt -o /dev/null -xc - >/dev/null 2>&1 && echo "y")
ifeq ($(CRYPT_AVAILABLE),y)
LDLIBS += m crypt
else
LDLIBS += m
endif
ifeq ($(CONFIG_PAM),y)
# libpam uses libpthread, so for static builds busybox must be linked to
# libpthread. On some platforms that requires an explicit -lpthread, so