ISAR/libmdbx
3
0
Fork 0
mirror of https://github.com/isar/libmdbx.git synced 2025-08-19 19:39:26 +08:00
Code Issues Packages Projects Releases Wiki Activity

mdbx-cmake: rework linking detection for std::filesystem.

Browse Source
This commit is contained in:
Леонид Юрьев (Leonid Yuriev)
2022-04-07 21:57:49 +03:00
parent 39a4a89650
commit 5ebcb90620
4 changed files with 118 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
GNUmakefile
View File

@@ -12,13 +12,21 @@ $(info // The GNU Make $(MAKE_VERSION))
SHELL := $(shell env bash -c 'echo $$BASH')
MAKE_VERx3 := $(shell printf "%3s%3s%3s" $(subst ., ,$(MAKE_VERSION)))
make_lt_3_81 := $(shell expr "$(MAKE_VERx3)" "<" " 3 81")
ifeq ($(make_lt_3_81),1)
ifneq ($(make_lt_3_81),0)
$(error Please use GNU Make 3.81 or above)
endif
make_lt_4_1 := $(shell expr "$(MAKE_VERx3)" "<" " 4 1")
make_ge_4_1 := $(shell expr "$(MAKE_VERx3)" ">=" " 4 1")
SRC_PROBE_C := $(shell [ -f mdbx.c ] && echo mdbx.c || echo src/osal.c)
SRC_PROBE_CXX := $(shell [ -f mdbx.c++ ] && echo mdbx.c++ || echo src/mdbx.c++)
UNAME := $(shell uname -s 2>/dev/null || echo Unknown)
define cxx_filesystem_probe
int main(int argc, const char*argv[]) {
mdbx::filesystem::path probe(argv[0]);
if (argc != 1) throw mdbx::filesystem::filesystem_error(std::string("fake"), std::error_code());
return mdbx::filesystem::is_directory(probe.relative_path());
}
endef
#
################################################################################
#
@@ -57,16 +65,16 @@ CXXFLAGS ?= $(strip $(CXXSTD) $(filter-out -std=gnu11,$(CFLAGS)))
# libraries adn options for linking
EXE_LDFLAGS ?= -pthread
ifeq ($(make_lt_4_1),1)
ifneq ($(make_ge_4_1),1)
# don't use variable expansion trick as workaround for bugs of GNU Make before 4.1
LIBS ?= $(shell $(uname2libs))
LDFLAGS ?= $(shell $(uname2ldflags))
LIB_STDCXXFS ?= $(shell echo 'int main(void) { MDBX_STD_FILESYSTEM_PATH probe; return probe.is_absolute(); }' | cat mdbx.h++ - | sed $$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs')
LIB_STDCXXFS ?= $(shell echo '$(cxx_filesystem_probe)' | cat mdbx.h++ - | sed $$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs')
else
# using variable expansion trick to avoid repeaded probes
LIBS ?= $(eval LIBS := $$(shell $$(uname2libs)))$(LIBS)
LDFLAGS ?= $(eval LDFLAGS := $$(shell $$(uname2ldflags)))$(LDFLAGS)
LIB_STDCXXFS ?= $(eval LIB_STDCXXFS := $$(shell echo 'int main(void) { MDBX_STD_FILESYSTEM_PATH probe; return probe.is_absolute(); }' | cat mdbx.h++ - | sed $$$$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs'))$(LIB_STDCXXFS)
LIB_STDCXXFS ?= $(eval LIB_STDCXXFS := $$(shell echo '$$(cxx_filesystem_probe)' | cat mdbx.h++ - | sed $$$$'1s/\xef\xbb\xbf//' | $(CXX) -x c++ $(CXXFLAGS) -Wno-error - -Wl,--allow-multiple-definition -lstdc++fs $(LIBS) $(LDFLAGS) $(EXE_LDFLAGS) -o /dev/null 2>probe4lstdfs.err >/dev/null && echo '-Wl,--allow-multiple-definition -lstdc++fs'))$(LIB_STDCXXFS)
endif
################################################################################