patching file src/Makefile.in
checking whether to enable maintainer-specific portions of Makefiles... no
checking whether make supports nested variables... yes
checking whether to enable debug build options... no
checking whether to enable compiler optimizer... (assumed) yes
checking whether to enable strict compiler warnings... no
checking whether to enable compiler warnings as errors... no
checking whether to enable curl debug memory tracking... no
checking whether to enable hiding of library internal symbols... yes
checking whether to enable c-ares for DNS lookups... no
checking whether to disable dependency on -lrt... (assumed no)
checking for path separator... :
checking for sed... /bin/sed
checking for grep... /bin/grep
checking for egrep... /bin/grep -E
checking for ar... /usr/bin/ar
checking for a BSD-compatible install... /bin/install -c
checking for gcc... gcc
checking whether the C compiler works... no
configure: error: in `/isthmus/tmp/curl-7.51.0':
configure: error: C compiler cannot create executables
See `config.log' for more details