LinuxQuestions.org - Help with variables in autoconf needed

Hi,

I'm having trouble getting CHECK_LIB to work with the following configure.in script:

Snip ...

Code:

# check for X:

AC_PATH_X



# linker flags for using with CHECK_LIB - checked library is appended automatically:

X_LDFLAGS="$X_LIBS -lX11 -lXmu -lXext -lXi"



GL_LDFLAGS="$X_LDFLAGS"



GLU_LDFLAGS="$GL_LDFLAGS -lGL"



GLUT_LDFLAGS="$GLU_LDFLAGS -lGLU"



AC_SUBST(X_LDFLAGS, $X_LDFLAGS)



AC_SUBST(GL_LDFLAGS, $GL_LDFLAGS)



AC_SUBST(GLU_LDFLAGS, $GLU_LDFLAGS)



AC_SUBST(GLUT_LDFLAGS, $GLUT_LDFLAGS)



# Checks for programs.

AC_PROG_CXX

AC_PROG_CC

AC_PROG_CC_C_O

AC_PROG_INSTALL



# Checks for header files.

AC_HEADER_STDC

AC_CHECK_HEADERS([stdlib.h unistd.h math.h GL/gl.h GL/glut.h])



# Checks for typedefs, structures, and compiler characteristics.

AC_HEADER_STDBOOL

                

# Check for libs:

AC_CHECK_LIB(GL, glVertex3f,

                  [],

                  AC_MSG_ERROR([*** libGL not found ***]),

                  $GL_LDFLAGS)



AC_CHECK_LIB(GLU, gluBeginCurve,

                  [],

                  AC_MSG_ERROR([*** libGLU not found ***]),

                  $GLU_LDFLAGS)



AC_CHECK_LIB(glut, glutMainLoop,

                  [],

                  AC_MSG_ERROR([*** libglut not found ***]),

                  $GLUT_LDFLAGS)

It throws a *** libGL not found *** error even though libGL exists and is in the path, and the flags are right. Any idea what i'm doing wrong? I thought it might be the variables, but just copying and pasting still doesn't work.