./configure –prefix=/usr/local
configure: error: Package requirements (libffi >= 3.0.0) were not met:
No package ‘libffi’ found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables LIBFFI_CFLAGS
and LIBFFI_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
解决办法：
安装 libffi-devel
# yum install libffi-devel