Problèmes d'installation gsl gem

je peux installer avec succès la bibliothèque gsl dans mon répertoire d'origine, mais quand j'essaie d'installer le gem gsl j'obtiens une grande liste d'erreurs que je ne comprends pas. Je me demande si quelqu'un pourrait me donner une idée de pourquoi je pourrais avoir ces erreurs. Je peux dire que j'ai:

installé gsl avec succès; du moins c'est ce à quoi il ressemblait. J'ai indiqué le chemin de la gsl-config

voici à quoi ressemble le journal des erreurs:

  Building native extensions.  This could take a while...
  ERROR:  Error installing gsl:
    ERROR: Failed to build gem native extension.

  /home/ted/ruby-1.9.1/bin/ruby extconf.rb install gsl
  checking gsl version... 1.15
  checking gsl cflags... -I/home/ted/gsl-1.15/include
  checking for main() in -lcblas... no
  checking gsl libs... -L/home/ted/gsl-1.15/lib -lgsl -lgslcblas -lm
  checking for round()... no
  checking for rngextra/rngextra.h... no
  checking for qrngextra/qrngextra.h... no
  checking for ool/ool_version.h... no
  checking for tensor/tensor.h... no
  checking for jacobi.h... no
  checking for gsl/gsl_cqp.h... no
  checking for gsl/gsl_multimin_fsdf.h... no
  checking for gsl_poly_solve_quartic() in -lgsl... no
  checking for gsl_eigen_francis() in -lgsl... no
  checking for ndlinear/gsl_multifit_ndlinear.h... no
  checking for alf/alf.h... no
  checking rb-gsl version...1.14.7
  checking ruby version... 1.9.1
  checking for graph... no
  checking for narray.h... yes
  checking for tamu_anova/tamu_anova.h... no
  checking for main() in -ltamuanova... no
  creating Makefile

  make
  gcc -I. -I/home/ted/ruby-1.9.1/include/ruby-1.9.1/x86_64-linux -I/home/ted/ruby-1.9.1/include/ruby-1.9.1/ruby/backward -I/home/ted/ruby-1.9.1/include/ruby-1.9.1 -I. -DHAVE_NARRAY_H  -I/home/ted/ruby-1.9.1/lib/ruby/gems/1.9.1/gems/narray-0.6.0.1/. -I/home/ted/ruby-1.9.1/lib/ruby/site_ruby/1.9.1/x86_64-linux    -fPIC  -Wall -I../include  -I/home/ted/gsl-1.15/include  -o sf_bessel.o -c sf_bessel.c
  In file included from sf_bessel.c:13:
  ../include/rb_gsl_sf.h:15:24: error: gsl/gsl_sf.h: No such file or directory
  ../include/rb_gsl_sf.h:16:27: error: gsl/gsl_errno.h: No such file or directory
  ../include/rb_gsl_sf.h:17:28: error: gsl/gsl_vector.h: No such file or directory
  In file included from ../include/rb_gsl_sf.h:18,
                   from sf_bessel.c:13:
  /home/ted/gsl-1.15/include/gsl/gsl_math.h:23:25: error: gsl/gsl_sys.h: No such file or directory
  In file included from sf_bessel.c:13:
  ../include/rb_gsl_sf.h:19:29: error: gsl/gsl_complex.h: No such file or directory
  In file included from ../include/rb_gsl.h:20,
                   from ../include/rb_gsl_sf.h:21,
                   from sf_bessel.c:13:
  ../include/rb_gsl_common.h:23:28: error: gsl/gsl_matrix.h: No such file or directory
  ../include/rb_gsl_common.h:24:33: error: gsl/gsl_permutation.h: No such file or directory
  ../include/rb_gsl_common.h:25:32: error: gsl/gsl_ieee_utils.h: No such file or directory
  In file included from ../include/rb_gsl.h:20,
                   from ../include/rb_gsl_sf.h:21,
                   from sf_bessel.c:13:
  ../include/rb_gsl_common.h:322: warning: type defaults to ‘int’ in declaration of ‘gsl_complex’
  ../include/rb_gsl_common.h:322: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
  ../include/rb_gsl_common.h:324: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
  ../include/rb_gsl_common.h:325: error: expected ‘)’ before ‘*’ token
  ../include/rb_gsl_common.h:326: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
  ../include/rb_gsl_common.h:328: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
  ../include/rb_gsl_common.h:329: error: expected ‘)’ before ‘*’ token
  ../include/rb_gsl_common.h:330: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
  ../include/rb_gsl_common.h:340: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘ary2complex’
  In file included from ../include/rb_gsl.h:21,
                   from ../include/rb_gsl_sf.h:21,
                   from sf_bessel.c:13:
  ../include/rb_gsl_math.h:24: error: expected ‘)’ before ‘(’ token
  In file included from ../include/rb_gsl.h:22,
                   from ../include/rb_gsl_sf.h:21,
                   from sf_bessel.c:13:
  ../include/rb_gsl_complex.h:19:34: error: gsl/gsl_complex_math.h: No such file or directory

...

  sf_bessel.c: In function ‘rb_gsl_sf_bessel_zero_J1_e’:
  sf_bessel.c:643: error: ‘gsl_sf_bessel_zero_J1_e’ undeclared (first use in this function)
  sf_bessel.c: In function ‘rb_gsl_sf_bessel_zero_Jnu’:
  sf_bessel.c:648: error: ‘gsl_sf_bessel_zero_Jnu’ undeclared (first use in this function)
  sf_bessel.c: In function ‘rb_gsl_sf_bessel_zero_Jnu_e’:
  sf_bessel.c:653: error: ‘gsl_sf_bessel_zero_Jnu_e’ undeclared (first use in this function)
  make: *** [sf_bessel.o] Error 1


  Gem files will remain installed in /home/ted/ruby-1.9.1/lib/ruby/gems/1.9.1/gems/gsl-1.14.7 for inspection.
  Results logged to /home/ted/ruby-1.9.1/lib/ruby/gems/1.9.1/gems/gsl-1.14.7/ext/gem_make.out