编译strongSwan报错 error: ‘uintptr_t‘ undeclared (first use in this function)； did you mean ‘__intptr_t‘

/bin/sh ../../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I../..  -I../../src/libstrongswan -DIPSEC_DIR=\"/usr/libexec/strongswan\" -DIPSEC_LIB_DIR=\"/usr/lib64/strongswan\" -DPLUGINDIR=\"/usr/lib64/strongswan/plugins\" -DSTRONGSWAN_CONF=\"/etc/strongswan/strongswan.conf\"       -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -Wno-pointer-sign -include /builddir/build/BUILD/strongswan-5.6.0/config.h -c -o crypto/transform.lo crypto/transform.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../.. -I../../src/libstrongswan -DIPSEC_DIR=\"/usr/libexec/strongswan\" -DIPSEC_LIB_DIR=\"/usr/lib64/strongswan\" -DPLUGINDIR=\"/usr/lib64/strongswan/plugins\" -DSTRONGSWAN_CONF=\"/etc/strongswan/strongswan.conf\" -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -Wno-pointer-sign -include /builddir/build/BUILD/strongswan-5.6.0/config.h -c library.c  -fPIC -DPIC -o .libs/library.o
In file included from utils/utils.h:55:0,
                 from library.h:101,
                 from library.c:17:
utils/utils/memory.h: In function 'memwipe_inline':
utils/utils/memory.h:99:15: error: 'uintptr_t' undeclared (first use in this function); did you mean '__intptr_t'?
  for (i = 0; (uintptr_t)&c[i] % sizeof(long) && i < n; i++)
               ^~~~~~~~~
               __intptr_t
utils/utils/memory.h:99:15: note: each undeclared identifier is reported only once for each function it appears in

原因：
最新版本的 glibc 在某些版本中不包含完整的 stdint.h 标头

解决方法：
修改 src/libstrongswan/utils/utils.h：

#define _GNU_SOURCE
#include <sys/types.h>
#include <stdlib.h>
#include <stdint.h>	//加入这行
#include <stddef.h>
#include <sys/time.h>
#include <string.h>

参考

https://wiki.strongswan.org/issues/2425