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build system: produce link map. Rather useful when you

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are wondering why your busybox is much bigger that you hoped for.
This commit is contained in:
Denis Vlasenko 2007-03-15 23:44:10 +00:00
parent 3ce293b585
commit 84a9b8750e
2 changed files with 4 additions and 4 deletions
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2
Makefile
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@ -563,7 +563,7 @@ busybox-all := $(core-y) $(libs-y)
# May be overridden by arch/$(ARCH)/Makefile # May be overridden by arch/$(ARCH)/Makefile
quiet_cmd_busybox__ ?= LINK $@ quiet_cmd_busybox__ ?= LINK $@
cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \ cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \
-o $@ \ -o $@ -Wl,-M \
-Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
-Wl,--start-group $(busybox-all) -Wl,--end-group -Wl,--start-group $(busybox-all) -Wl,--end-group

6
scripts/trylink
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@ -6,7 +6,7 @@ try() {
added="$1" added="$1"
shift shift
$debug && echo "Trying: $* $added" $debug && echo "Trying: $* $added"
"$@" $added >/dev/null 2>&1 \ "$@" $added >busybox.map 2>busybox_ld.err \
&& exit 0 && exit 0
} }
@ -14,5 +14,5 @@ try "" "$@"
try "-lm" "$@" try "-lm" "$@"
try "-lcrypt" "$@" try "-lcrypt" "$@"
try "-Wl,--start-group -lcrypt -lm -Wl,--end-group" "$@" try "-Wl,--start-group -lcrypt -lm -Wl,--end-group" "$@"
# It failed. Rerun & let people see the error messages # It failed. Let people see the error messages
"$@" $added cat busybox_ld.err