[Bug fortran/23423] New: module routines do not resolve module's interface blocks

["jeffrey dot armstrong at analexcleveland dot com" <gcc-bugzilla at gcc dot gnu dot org>]

Functions/subroutines in a module are not aware of interfaces declared within
the module.  For example, the test case:

! BEGIN test.f90 -----------------------------
module test
implicit none

interface foo
	module procedure foo_4
	module procedure foo_8
end interface foo

contains

function foo_4(input_num)
implicit none

	real(kind=4)::foo_4
	real(kind=4)::input_num

	foo_4 = input_num*input_num
end function foo_4

function foo_8(input_num)
implicit none

	real(kind=8)::foo_8
	real(kind=8)::input_num

	foo_8 = input_num*input_num
end function foo_8

function bar(input_num)
implicit none

	real(kind=8)::bar
	real(kind=8)::input_num

	bar = foo(input_num)

end function bar

end module test

! END test.f90 -------------------------------

When compiled, gcc returns the following output:

$ gfortran -v -save-temps -c test.f90
Using built-in specs.
Target: i686-pc-cygwin
Configured with: ../gcc-4.0.1/configure --enable-threads=win32 --enable-java-awt=gtk
Thread model: win32
gcc version 4.0.1
 /usr/local/libexec/gcc/i686-pc-cygwin/4.0.1/f951.exe test.f90 -quiet -dumpbase
test.f90 -mtune=pentiumpro -auxbase test -version -o test.s
GNU F95 version 4.0.1 (i686-pc-cygwin)
        compiled by GNU C version 4.0.1.
GGC heuristics: --param ggc-min-expand=64 --param ggc-min-heapsize=65446
 In file test.f90:35

 bar = foo(input_num)
         1
Error: Symbol 'foo' at (1) has no IMPLICIT type

Other Fortran compilers (Absoft, DEC/Compaq Visual Fortran) are able to compile
this code.

-- 
           Summary: module routines do not resolve module's interface blocks
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jeffrey dot armstrong at analexcleveland dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-cygwin
  GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23423