expat 2.2.1 compilation error (macOS/gcc)

expat-2.2.1-macos-gcc.txt

OS: macOS 10.12.5
CC: gcc-7 (GCC 7.1.0)
CXX: g++-7 (GCC 7.1.0)

$ ./configure CC=gcc-7 CXX=g++-7
checking build system type... x86_64-apple-darwin16.6.0
checking host system type... x86_64-apple-darwin16.6.0
checking how to print strings... printf
checking for gcc... gcc-7
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc-7 accepts -g... yes
checking for gcc-7 option to accept ISO C89... none needed
checking for a sed that does not truncate output... /usr/local/bin/gsed
checking for grep that handles long lines and -e... /usr/local/bin/grep
checking for egrep... /usr/local/bin/grep -E
checking for fgrep... /usr/local/bin/grep -F
checking for ld used by gcc-7... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... no
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 196608
checking how to convert x86_64-apple-darwin16.6.0 file names to x86_64-apple-darwin16.6.0 format... func_convert_file_noop
checking how to convert x86_64-apple-darwin16.6.0 file names to toolchain format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... dlltool
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... no
checking for strip... strip
checking for ranlib... ranlib
checking for gawk... gawk
checking command to parse /usr/bin/nm -B output from gcc-7 object... ok
checking for sysroot... no
checking for a working dd... /bin/dd
checking how to truncate binary pipes... /bin/dd bs=4096 count=1
checking for mt... no
checking if : is a manifest tool... no
checking for dsymutil... dsymutil
checking for nmedit... nmedit
checking for lipo... lipo
checking for otool... otool
checking for otool64... no
checking for -single_module linker flag... yes
checking for -exported_symbols_list linker flag... yes
checking for -force_load linker flag... yes
checking how to run the C preprocessor... gcc-7 -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc-7 supports -fno-rtti -fno-exceptions... no
checking for gcc-7 option to produce PIC... -fno-common -DPIC
checking if gcc-7 PIC flag -fno-common -DPIC works... yes
checking if gcc-7 static flag -static works... no
checking if gcc-7 supports -c -o file.o... yes
checking if gcc-7 supports -c -o file.o... (cached) yes
checking whether the gcc-7 linker (/usr/bin/ld) supports shared libraries... yes
checking dynamic linker characteristics... darwin16.6.0 dyld
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking for gcc... (cached) gcc-7
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc-7 accepts -g... (cached) yes
checking for gcc-7 option to accept ISO C89... (cached) none needed
checking whether we are using the GNU C++ compiler... yes
checking whether g++-7 accepts -g... yes
checking how to run the C++ preprocessor... g++-7 -E
checking for ld used by g++-7... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... no
checking whether the g++-7 linker (/usr/bin/ld) supports shared libraries... yes
checking for g++-7 option to produce PIC... -fno-common -DPIC
checking if g++-7 PIC flag -fno-common -DPIC works... yes
checking if g++-7 static flag -static works... no
checking if g++-7 supports -c -o file.o... yes
checking if g++-7 supports -c -o file.o... (cached) yes
checking whether the g++-7 linker (/usr/bin/ld) supports shared libraries... yes
checking dynamic linker characteristics... darwin16.6.0 dyld
checking how to hardcode library paths into programs... immediate
checking for a BSD-compatible install... /usr/local/bin/ginstall -c
checking whether gcc-7 accepts -fexceptions... yes
checking for ANSI C header files... (cached) yes
checking whether byte ordering is bigendian... no
checking for an ANSI C-conforming const... yes
checking for size_t... yes
checking for memmove... yes
checking for bcopy... yes
checking for arc4random_buf (BSD or libbsd)... yes
checking for getrandom (Linux 3.17+, glibc 2.25+)... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking for unistd.h... (cached) yes
checking for off_t... yes
checking for stdlib.h... (cached) yes
checking for unistd.h... (cached) yes
checking for sys/param.h... yes
checking for getpagesize... yes
checking for working mmap... yes
checking for gcc-7 option to accept ISO C99... none needed
checking for gcc-7 option to accept ISO Standard C... (cached) none needed
checking for an ANSI C99-conforming __func__... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: WARNING:  'Makefile.in' seems to ignore the --datarootdir setting
config.status: creating expat.pc
config.status: creating run.sh
config.status: creating expat_config.h
config.status: expat_config.h is unchanged
config.status: executing libtool commands

$ make
/bin/sh ./libtool --verbose --mode=compile gcc-7 -I./lib -I. -g -O2 -Wall -Wmissing-prototypes -Wstrict-prototypes -fexceptions -fno-strict-aliasing  -DHAVE_EXPAT_CONFIG_H -o lib/xmlparse.lo -c lib/xmlparse.c
libtool: compile:  gcc-7 -I./lib -I. -g -O2 -Wall -Wmissing-prototypes -Wstrict-prototypes -fexceptions -fno-strict-aliasing -DHAVE_EXPAT_CONFIG_H -c lib/xmlparse.c  -fno-common -DPIC -o lib/.libs/xmlparse.o
lib/xmlparse.c:626:23: error: expected ')' before '->' token
 #define buffer (parser->m_buffer)
                       ^
In file included from lib/xmlparse.c:702:0:
/usr/include/sys/random.h:37:30: error: expected ';', ',' or ')' before 'size_t'
 int getentropy(void* buffer, size_t size);
                              ^~~~~~
lib/xmlparse.c: In function 'writeRandomBytes_getrandom':
lib/xmlparse.c:721:9: warning: implicit declaration of function 'getrandom'; did you mean 'srandom'? [-Wimplicit-function-declaration]
         getrandom(currentTarget, bytesToWrite, getrandomFlags);
         ^~~~~~~~~
         srandom
At top level:
lib/xmlparse.c:710:1: warning: 'writeRandomBytes_getrandom' defined but not used [-Wunused-function]
 writeRandomBytes_getrandom(void * target, size_t count) {
 ^~~~~~~~~~~~~~~~~~~~~~~~~~
make: *** [Makefile:208: lib/xmlparse.lo] Error 1

Hi!
There is a fix upstream for that now if you still need one: libexpat/libexpat@602e6c7