error compiling gcc: undefined reference to libc_name_p

When compiling GCC it is possible to get very far开发者_StackOverflow中文版 in the build process only to hiccup on an error complaining about the lack of gperf installed. After installing gperf and running, I hit an "undefined reference to libc_name_p." I've looked at the solutions here and here but they weren't helpful.

When gperf wasn't installed, the compilation script ran the command anyway but generated a blank ./gcc/cp/cfns.h. Since this file was newer than the source (./gcc/cp/cfns.gperf) the makefile left it alone and never regenerated the 'real' file when you actually had gperf. To continue, run rm ./gcc/cp/cfns.h and try again.