I am trying to install proj4rb on Ubuntu 14.04. Three methods are provided in the README file, but they all fail.
1. Using gem
$ gem install proj4rbBuilding native extensions. This could take a while...ERROR: Error installing proj4rb: ERROR: Failed to build gem native extension. /home/desousa/.rvm/gems/ruby-1.9.2-p290 extconf.rbchecking for proj_api.h... yeschecking for projects.h... yeschecking for pj_init() in -lproj... yescreating Makefilemake "DESTDIR="linking shared-object proj4_ruby.soprojrb.o: In function `proj_get_def':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:146: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:147: undefined reference to `pj_get_def'projrb.o: In function `proj_is_geocent':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:135: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:136: undefined reference to `pj_is_geocent'projrb.o: In function `proj_is_latlong':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:124: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:125: undefined reference to `pj_is_latlong'projrb.o: In function `proj_initialize':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:79: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:86: undefined reference to `rb_ary_entry'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:87: undefined reference to `rb_string_value_ptr'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:90: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:91: undefined reference to `pj_init'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:94: undefined reference to `pj_get_errno_ref'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `rb_int2num_inline':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_initialize':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:96: undefined reference to `rb_raise'projrb.o: In function `proj_free':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:41: undefined reference to `pj_free'projrb.o: In function `proj_error_message':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:62: undefined reference to `pj_strerrno'projrb.o: In function `rb_num2long_inline':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:598: undefined reference to `rb_num2long'projrb.o: In function `proj_error_message':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:62: undefined reference to `pj_strerrno'projrb.o: In function `proj_forward':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:161: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:163: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:163: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:164: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:164: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:165: undefined reference to `pj_fwd'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:167: undefined reference to `pj_get_errno_ref'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `proj_forward':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:169: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:169: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:170: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:170: undefined reference to `rb_funcall'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_forward':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:173: undefined reference to `rb_raise'projrb.o: In function `proj_inverse':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:192: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:194: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:194: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:195: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:195: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:196: undefined reference to `pj_inv'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:198: undefined reference to `pj_get_errno_ref'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `proj_inverse':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:200: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:200: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:201: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:201: undefined reference to `rb_funcall'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_inverse':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:204: undefined reference to `rb_raise'projrb.o: In function `proj_transform':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:229: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:230: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:232: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:232: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:233: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:233: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:236: undefined reference to `rb_respond_to'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:242: undefined reference to `pj_transform'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `proj_transform':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:237: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:237: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:244: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:244: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:245: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:245: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:247: undefined reference to `rb_respond_to'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:248: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:248: undefined reference to `rb_funcall'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_transform':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:252: undefined reference to `rb_raise'projrb.o: In function `Init_proj4_ruby':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:494: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:496: undefined reference to `rb_define_module'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:501: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:501: undefined reference to `rb_define_const'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:505: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:505: undefined reference to `rb_define_const'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:509: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:509: undefined reference to `rb_define_const'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:511: undefined reference to `rb_path2class'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:511: undefined reference to `rb_define_class_under'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:512: undefined reference to `rb_define_singleton_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:514: undefined reference to `rb_define_class_under'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:515: undefined reference to `rb_define_alloc_func'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:516: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:520: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:521: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:522: undefined reference to `rb_define_alias'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:523: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:524: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:525: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:493: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:492: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:491: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:490: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:489: undefined reference to `rb_intern2'projrb.o:c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:488: more undefined references to `rb_intern2' followprojrb.o: In function `proj_get_def':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:147: undefined reference to `rb_str_new_cstr'projrb.o: In function `proj_alloc':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:50: undefined reference to `rb_data_object_alloc'projrb.o: In function `proj_error_message':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:64: undefined reference to `rb_str_new_cstr'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:66: undefined reference to `rb_str_new'projrb.o: In function `Init_proj4_ruby':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:526: undefined reference to `rb_define_method'projrb.o
rojrb.c.rdata$.refptr.rb_cObject[.refptr.rb_cObject]+0x0): undefined reference to `rb_cObject'projrb.orojrb.c.rdata$.refptr.rb_eSystemCallError[.refptr.rb_eSystemCallError]+0x0): undefined reference to `rb_eSystemCallError'collect2: error: ld returned 1 exit statusmake: *** [proj4_ruby.so] Error 1Gem files will remain installed in /home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/proj4rb-1.0.0 for inspection.Results logged to /home/desousa/.rvm/gems/ruby-1.9.2-p290/extensions/x86_64-linux/1.9.1/proj4rb-1.0.0/gem_make.outThere is an open issue at GitHub with this problem.
2. Using rake
$ cd ~/temp/ruby/proj4rb-1.0.0$ ls -latotal 56drwx------ 7 desousa desousa 4096 Feb 24 09:59 .drwxrwxr-x 3 desousa desousa 4096 Feb 24 10:00 ..-rw-rw-r-- 1 desousa desousa 1050 Dec 15 04:13 ChangeLogdrwx------ 2 desousa desousa 4096 Feb 24 09:59 datadrwx------ 2 desousa desousa 4096 Feb 24 09:59 exampledrwx------ 3 desousa desousa 4096 Feb 24 09:59 ext-rw-rw-r-- 1 desousa desousa 86 Dec 15 04:13 .gitignoredrwx------ 2 desousa desousa 4096 Feb 24 09:59 lib-rw-rw-r-- 1 desousa desousa 1130 Dec 15 04:13 MIT-LICENSE-rw-rw-r-- 1 desousa desousa 1068 Dec 15 04:13 proj4rb.gemspec-rw-rw-r-- 1 desousa desousa 1020 Dec 15 04:13 Rakefile-rw-rw-r-- 1 desousa desousa 6211 Dec 15 04:13 README.rdocdrwx------ 2 desousa desousa 4096 Feb 24 09:59 test$ rake build --tracerake aborted!Don't know how to build task 'build'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/task_manager.rb:62:in `[]'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:149:in `invoke_task'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:106:in `each'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:106:in `block in top_level'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:115:in `run_with_threads'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:100:in `top_level'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:78:in `block in run'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:176:in `standard_exception_handling'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:75:in `run'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/bin/rake:33:in `'/home/desousa/.rvm/gems/ruby-1.9.2-p290/bin/rake:23:in `load'/home/desousa/.rvm/gems/ruby-1.9.2-p290/bin/rake:23:in `'3. Using make
$ cd ext$ ruby extconf.rbchecking for proj_api.h... yeschecking for projects.h... yeschecking for pj_init() in -lproj... yescreating Makefile$ makegcc -I. -I/home/desousa/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/x86_64-linux -I/home/desousa/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/ruby/backward -I/home/desousa/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1 -I. -DHAVE_PROJ_API_H -DHAVE_PROJECTS_H -fPIC -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -fPIC -o projrb.o -c projrb.cIn file included from /usr/local/include/projects.h:244:0, from projrb.c:3:/usr/include/proj_api.h:61:5: error: unknown type name ‘projCtx_t’ typedef projCtx_t *projCtx; ^make: *** [projrb.o] Error 1Update I: I have tried to install proj4rb19, a version specifically targeted for Ruby 1.9. While it compiles correctly, it fails to install.
Update II: I am using RVM, with the following setup:
$ rvm -vrvm 1.26.10 (manual) by Wayne E. Seguin , Michal Papis [https://rvm.io/]$ ruby -vruby 1.9.3p551 (2014-11-13 revision 48407) [x86_64-linux]$ gem -v2.4.3
أكثر...
1. Using gem
$ gem install proj4rbBuilding native extensions. This could take a while...ERROR: Error installing proj4rb: ERROR: Failed to build gem native extension. /home/desousa/.rvm/gems/ruby-1.9.2-p290 extconf.rbchecking for proj_api.h... yeschecking for projects.h... yeschecking for pj_init() in -lproj... yescreating Makefilemake "DESTDIR="linking shared-object proj4_ruby.soprojrb.o: In function `proj_get_def':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:146: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:147: undefined reference to `pj_get_def'projrb.o: In function `proj_is_geocent':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:135: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:136: undefined reference to `pj_is_geocent'projrb.o: In function `proj_is_latlong':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:124: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:125: undefined reference to `pj_is_latlong'projrb.o: In function `proj_initialize':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:79: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:86: undefined reference to `rb_ary_entry'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:87: undefined reference to `rb_string_value_ptr'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:90: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:91: undefined reference to `pj_init'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:94: undefined reference to `pj_get_errno_ref'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `rb_int2num_inline':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_initialize':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:96: undefined reference to `rb_raise'projrb.o: In function `proj_free':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:41: undefined reference to `pj_free'projrb.o: In function `proj_error_message':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:62: undefined reference to `pj_strerrno'projrb.o: In function `rb_num2long_inline':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:598: undefined reference to `rb_num2long'projrb.o: In function `proj_error_message':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:62: undefined reference to `pj_strerrno'projrb.o: In function `proj_forward':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:161: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:163: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:163: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:164: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:164: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:165: undefined reference to `pj_fwd'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:167: undefined reference to `pj_get_errno_ref'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `proj_forward':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:169: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:169: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:170: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:170: undefined reference to `rb_funcall'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_forward':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:173: undefined reference to `rb_raise'projrb.o: In function `proj_inverse':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:192: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:194: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:194: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:195: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:195: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:196: undefined reference to `pj_inv'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:198: undefined reference to `pj_get_errno_ref'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `proj_inverse':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:200: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:200: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:201: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:201: undefined reference to `rb_funcall'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_inverse':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:204: undefined reference to `rb_raise'projrb.o: In function `proj_transform':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:229: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:230: undefined reference to `rb_check_type'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:232: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:232: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:233: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:233: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:236: undefined reference to `rb_respond_to'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:242: undefined reference to `pj_transform'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:35: undefined reference to `rb_funcall'projrb.o: In function `proj_transform':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:237: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:237: undefined reference to `rb_num2dbl'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:244: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:244: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:245: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:245: undefined reference to `rb_funcall'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:247: undefined reference to `rb_respond_to'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:248: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:248: undefined reference to `rb_funcall'projrb.o: In function `raise_error':c:\mingw64\mingw64\local\src\proj4rb\ext/c:/mingw64/mingw64/local/ruby/include/ruby-2.1.0/ruby/ruby.h:1286: undefined reference to `rb_int2big'projrb.o: In function `proj_transform':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:252: undefined reference to `rb_raise'projrb.o: In function `Init_proj4_ruby':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:494: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:496: undefined reference to `rb_define_module'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:501: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:501: undefined reference to `rb_define_const'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:505: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:505: undefined reference to `rb_define_const'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:509: undefined reference to `rb_float_new'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:509: undefined reference to `rb_define_const'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:511: undefined reference to `rb_path2class'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:511: undefined reference to `rb_define_class_under'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:512: undefined reference to `rb_define_singleton_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:514: undefined reference to `rb_define_class_under'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:515: undefined reference to `rb_define_alloc_func'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:516: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:520: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:521: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:522: undefined reference to `rb_define_alias'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:523: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:524: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:525: undefined reference to `rb_define_method'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:493: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:492: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:491: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:490: undefined reference to `rb_intern2'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:489: undefined reference to `rb_intern2'projrb.o:c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:488: more undefined references to `rb_intern2' followprojrb.o: In function `proj_get_def':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:147: undefined reference to `rb_str_new_cstr'projrb.o: In function `proj_alloc':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:50: undefined reference to `rb_data_object_alloc'projrb.o: In function `proj_error_message':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:64: undefined reference to `rb_str_new_cstr'c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:66: undefined reference to `rb_str_new'projrb.o: In function `Init_proj4_ruby':c:\mingw64\mingw64\local\src\proj4rb\ext/projrb.c:526: undefined reference to `rb_define_method'projrb.o
rojrb.c.rdata$.refptr.rb_cObject[.refptr.rb_cObject]+0x0): undefined reference to `rb_cObject'projrb.orojrb.c.rdata$.refptr.rb_eSystemCallError[.refptr.rb_eSystemCallError]+0x0): undefined reference to `rb_eSystemCallError'collect2: error: ld returned 1 exit statusmake: *** [proj4_ruby.so] Error 1Gem files will remain installed in /home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/proj4rb-1.0.0 for inspection.Results logged to /home/desousa/.rvm/gems/ruby-1.9.2-p290/extensions/x86_64-linux/1.9.1/proj4rb-1.0.0/gem_make.outThere is an open issue at GitHub with this problem.2. Using rake
$ cd ~/temp/ruby/proj4rb-1.0.0$ ls -latotal 56drwx------ 7 desousa desousa 4096 Feb 24 09:59 .drwxrwxr-x 3 desousa desousa 4096 Feb 24 10:00 ..-rw-rw-r-- 1 desousa desousa 1050 Dec 15 04:13 ChangeLogdrwx------ 2 desousa desousa 4096 Feb 24 09:59 datadrwx------ 2 desousa desousa 4096 Feb 24 09:59 exampledrwx------ 3 desousa desousa 4096 Feb 24 09:59 ext-rw-rw-r-- 1 desousa desousa 86 Dec 15 04:13 .gitignoredrwx------ 2 desousa desousa 4096 Feb 24 09:59 lib-rw-rw-r-- 1 desousa desousa 1130 Dec 15 04:13 MIT-LICENSE-rw-rw-r-- 1 desousa desousa 1068 Dec 15 04:13 proj4rb.gemspec-rw-rw-r-- 1 desousa desousa 1020 Dec 15 04:13 Rakefile-rw-rw-r-- 1 desousa desousa 6211 Dec 15 04:13 README.rdocdrwx------ 2 desousa desousa 4096 Feb 24 09:59 test$ rake build --tracerake aborted!Don't know how to build task 'build'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/task_manager.rb:62:in `[]'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:149:in `invoke_task'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:106:in `each'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:106:in `block in top_level'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:115:in `run_with_threads'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:100:in `top_level'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:78:in `block in run'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:176:in `standard_exception_handling'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/lib/rake/application.rb:75:in `run'/home/desousa/.rvm/gems/ruby-1.9.2-p290/gems/rake-10.3.2/bin/rake:33:in `'/home/desousa/.rvm/gems/ruby-1.9.2-p290/bin/rake:23:in `load'/home/desousa/.rvm/gems/ruby-1.9.2-p290/bin/rake:23:in `'3. Using make
$ cd ext$ ruby extconf.rbchecking for proj_api.h... yeschecking for projects.h... yeschecking for pj_init() in -lproj... yescreating Makefile$ makegcc -I. -I/home/desousa/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/x86_64-linux -I/home/desousa/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1/ruby/backward -I/home/desousa/.rvm/rubies/ruby-1.9.2-p290/include/ruby-1.9.1 -I. -DHAVE_PROJ_API_H -DHAVE_PROJECTS_H -fPIC -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -fPIC -o projrb.o -c projrb.cIn file included from /usr/local/include/projects.h:244:0, from projrb.c:3:/usr/include/proj_api.h:61:5: error: unknown type name ‘projCtx_t’ typedef projCtx_t *projCtx; ^make: *** [projrb.o] Error 1Update I: I have tried to install proj4rb19, a version specifically targeted for Ruby 1.9. While it compiles correctly, it fails to install.
Update II: I am using RVM, with the following setup:
$ rvm -vrvm 1.26.10 (manual) by Wayne E. Seguin , Michal Papis [https://rvm.io/]$ ruby -vruby 1.9.3p551 (2014-11-13 revision 48407) [x86_64-linux]$ gem -v2.4.3
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