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Allow us to build a semi-dynamic official binary that works back to CentOS 6, at least on x64, and is very fast since we can build it with newer clang or icc.

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This commit is contained in:
Adam Ierymenko 2018-02-01 15:52:41 -08:00
parent 51715376bf
commit 26aaf253ac
3 changed files with 28 additions and 3 deletions
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18
ext/misc/linux-old-glibc-compat.c Normal file
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@ -0,0 +1,18 @@
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
#ifdef __cplusplus
extern "C" {
#endif
extern void *__wrap_memcpy(void *dest,const void *src,size_t n)
{
return memcpy(dest,src,n);
}
#ifdef __cplusplus
}
#endif

11
make-linux.mk
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@ -71,7 +71,6 @@ ifeq ($(ZT_DEBUG),1)
# C25519 in particular is almost UNUSABLE in -O0 even on a 3ghz box!
node/Salsa20.o node/SHA512.o node/C25519.o node/Poly1305.o: CXXFLAGS=-Wall -O2 -g -pthread $(INCLUDES) $(DEFS)
else
override DEFS+=-D_FORTIFY_SOURCE=2
CFLAGS?=-O3 -fstack-protector
override CFLAGS+=-Wall -Wno-deprecated -fPIE -pthread $(INCLUDES) -DNDEBUG $(DEFS)
CXXFLAGS?=-O3 -fstack-protector
@ -210,6 +209,12 @@ ifeq ($(ZT_STATIC),1)
override LDFLAGS+=-static
endif
# For building an official semi-static binary on CentOS 7
ifeq ($(ZT_OFFICIAL),1)
CORE_OBJS+=ext/misc/linux-old-glibc-compat.o
override LDFLAGS+=-Wl,--wrap=memcpy -static-libstdc++
endif
# ARM32 hell -- use conservative CFLAGS
ifeq ($(ZT_ARCHITECTURE),3)
ifeq ($(shell if [ -e /usr/bin/dpkg ]; then dpkg --print-architecture; fi),armel)
@ -254,7 +259,7 @@ libzerotiercore.a: FORCE
core: libzerotiercore.a
selftest: $(CORE_OBJS) $(ONE_OBJS) selftest.o
$(CXX) $(CXXFLAGS) $(LDFLAGS) -o zerotier-selftest selftest.o $(CORE_OBJS) $(ONE_OBJS $(LDLIBS)
$(CXX) $(CXXFLAGS) $(LDFLAGS) -o zerotier-selftest selftest.o $(CORE_OBJS) $(ONE_OBJS) $(LDLIBS)
$(STRIP) zerotier-selftest
zerotier-selftest: selftest
@ -265,7 +270,7 @@ manpages: FORCE
doc: manpages
clean: FORCE
rm -rf *.a *.so *.o node/*.o controller/*.o osdep/*.o service/*.o ext/http-parser/*.o ext/miniupnpc/*.o ext/libnatpmp/*.o $(CORE_OBJS) $(ONE_OBJS) zerotier-one zerotier-idtool zerotier-cli zerotier-selftest build-* ZeroTierOneInstaller-* *.deb *.rpm .depend debian/files debian/zerotier-one*.debhelper debian/zerotier-one.substvars debian/*.log debian/zerotier-one doc/node_modules
rm -rf *.a *.so *.o node/*.o controller/*.o osdep/*.o service/*.o ext/http-parser/*.o ext/miniupnpc/*.o ext/libnatpmp/*.o $(CORE_OBJS) $(ONE_OBJS) zerotier-one zerotier-idtool zerotier-cli zerotier-selftest build-* ZeroTierOneInstaller-* *.deb *.rpm .depend debian/files debian/zerotier-one*.debhelper debian/zerotier-one.substvars debian/*.log debian/zerotier-one doc/node_modules ext/misc/*.o
distclean: clean

2
selftest.cpp
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@ -660,6 +660,7 @@ static int testOther()
std::cout << " " << InetAddress("").toString(buf);
std::cout << std::endl;
#if 0
std::cout << "[other] Benchmarking memcpy... "; std::cout.flush();
{
unsigned char *bb = (unsigned char *)::malloc(1234567);
@ -681,6 +682,7 @@ static int testOther()
::free((void *)bb);
::free((void *)cc);
}
#endif
std::cout << "[other] Benchmarking ZT_FAST_MEMCPY... "; std::cout.flush();
{