I'm trying to setup my VPS (CentOS 6.4) with ruby on rails and postgres.
I installed ruby (2.1.0p0), rails (4.1.0), and postgresql (9.3.4) with no problem.
When I try create new rails app (rails new new_app -d postgresql) it stops when installing the pg gem. I've looked into all SO posts about this error and tried pretty much everything I could find. The most suggested was to run "yum install postgresql-devel" and still didn't work.
Below you can find the ssh output and the mkmf.log. Let me know if need more information...
Output
Building native extensions. This could take a while... ERROR: Error installing pg: ERROR: Failed to build gem native extension. /home/deploy/.rvm/rubies/ruby-2.1.0/bin/ruby extconf.rb checking for pg_config... yes Using config values from /usr/bin/pg_config checking for libpq-fe.h... *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/home/deploy/.rvm/rubies/ruby-2.1.0/bin/ruby --with-pg --without-pg --with-pg-config --without-pg-config --with-pg_config --without-pg_config --with-pg-dir --without-pg-dir --with-pg-include --without-pg-include=${pg-dir}/include --with-pg-lib --without-pg-lib=${pg-dir}/lib /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError) You have to install development tools first. from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:587:in `try_cpp' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:1120:in `block in find_header' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:918:in `block in checking_for' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:351:in `block (2 levels) in postpone' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:321:in `open' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:351:in `block in postpone' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:321:in `open' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:347:in `postpone' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:917:in `checking_for' from /home/deploy/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/mkmf.rb:1119:in `find_header' from extconf.rb:48:in `' extconf failed, exit code 1
mkmf.log
"gcc -o conftest -I/home/deploy/.rvm/rubies/ruby-2.1.0/include/ruby-2.1.0/x86_64-linux -I/home/deploy/.rvm/rubies/ruby-2.1.0/include/ruby-2.1.0/ruby/backward -I/home/deploy/.rvm/rubies/ruby-2.1.0/include/ruby-2.1.0 -I. -I/usr/include -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -fPIC conftest.c -L. -L/home/deploy/.rvm/rubies/ruby-2.1.0/lib -Wl,-R/home/deploy/.rvm/rubies/ruby-2.1.0/lib -L/usr/lib64 -Wl,-R/usr/lib64 -L. -fstack-protector -rdynamic -Wl,-export-dynamic -Wl,-rpath,'/../lib' -Wl,-R -Wl,'/../lib' -L'/../lib' -lruby -lpthread -lrt -ldl -lcrypt -lm -lc" gcc: error trying to exec 'as': execvp: Permission denied checked program was: /* begin */ 1: #include "ruby.h" 2: 3: int main(int argc, char **argv) 4: { 5: return 0; 6: } /* end */