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Makefile: support linking programs to shared library

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Most Linux distributions want dynamic linking rather than static
linking, so support this via 'make USE_SHARED_LIB=1'.
This commit is contained in:
Eric Biggers 2020-10-25 21:24:17 -07:00
parent 2bfee0204c
commit f2f6a6e396
2 changed files with 27 additions and 5 deletions
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19
Makefile
View File

@ -3,6 +3,9 @@
#
# Define V=1 to enable "verbose" mode, showing all executed commands.
#
# Define USE_SHARED_LIB to link the binaries to the shared library version of
# libdeflate rather than to the static library version.
#
# Define DECOMPRESSION_ONLY to omit all compression code, building a
# decompression-only library. If doing this, you must also build a specific
# library target such as 'libdeflate.a', as the programs will no longer compile.
@ -138,6 +141,7 @@ endif
# Rebuild if a user-specified setting that affects the build changed.
.build-config: FORCE
@flags=$$( \
echo 'USE_SHARED_LIB=$(USE_SHARED_LIB)'; \
echo 'DECOMPRESSION_ONLY=$(DECOMPRESSION_ONLY)'; \
echo 'DISABLE_GZIP=$(DISABLE_GZIP)'; \
echo 'DISABLE_ZLIB=$(DISABLE_ZLIB)'; \
@ -267,12 +271,17 @@ $(ALL_PROG_OBJ): %.o: %.c $(ALL_PROG_COMMON_HEADERS) $(COMMON_HEADERS) \
# Note: the test programs are not compiled by default. One reason is that the
# test programs must be linked with zlib for doing comparisons.
$(NONTEST_PROGRAMS): %$(PROG_SUFFIX): programs/%.o $(PROG_COMMON_OBJ) \
$(STATIC_LIB)
ifdef USE_SHARED_LIB
LIB := $(SHARED_LIB)
else
LIB := $(STATIC_LIB)
endif
$(NONTEST_PROGRAMS): %$(PROG_SUFFIX): programs/%.o $(PROG_COMMON_OBJ) $(LIB)
$(QUIET_CCLD) $(CC) -o $@ $(LDFLAGS) $(PROG_CFLAGS) $+
$(TEST_PROGRAMS): %$(PROG_SUFFIX): programs/%.o $(PROG_COMMON_OBJ) \
$(TEST_PROG_COMMON_OBJ) $(STATIC_LIB)
$(TEST_PROG_COMMON_OBJ) $(LIB)
$(QUIET_CCLD) $(CC) -o $@ $(LDFLAGS) $(PROG_CFLAGS) $+ -lz
ifdef HARD_LINKS
@ -322,9 +331,9 @@ test_programs:$(TEST_PROGRAMS)
# A minimal 'make check' target. This only runs some quick tests;
# use scripts/run_tests.sh if you want to run the full tests.
check:test_programs
./benchmark$(PROG_SUFFIX) < ./benchmark$(PROG_SUFFIX)
LD_LIBRARY_PATH=. ./benchmark$(PROG_SUFFIX) < ./benchmark$(PROG_SUFFIX)
for prog in test_*; do \
./$$prog || exit 1; \
LD_LIBRARY_PATH=. ./$$prog || exit 1; \
done
# Run the clang static analyzer.

13
scripts/run_tests.sh
View File

@ -203,6 +203,18 @@ check_symbol_prefixes() {
fi
}
test_use_shared_lib() {
log "Testing USE_SHARED_LIB=1"
$MAKE gzip
if ldd gzip | grep -q 'libdeflate.so'; then
fail "Binary should be statically linked by default"
fi
$MAKE USE_SHARED_LIB=1 all check
if ! ldd gzip | grep -q 'libdeflate.so'; then
fail "Binary isn't dynamically linked"
fi
}
install_uninstall_tests() {
local shell
@ -280,6 +292,7 @@ run_tests() {
install_uninstall_tests
check_symbol_prefixes
test_use_shared_lib
}
###############################################################################