[committed][gdb/testsuite] Fix gdb.fortran/info-modules.exp with gcc-8

[Tom de Vries]

Hi,

When using test-case gdb.fortran/info-modules.exp with gcc 8.4.0, I run into:
...
FAIL: gdb.fortran/info-modules.exp: info module variables: check for entry \
  'info-types.f90', '35', 'Type m1t1 mod1::__def_init_mod1_M1t1;'
FAIL: gdb.fortran/info-modules.exp: info module variables: check for entry \
  'info-types.f90', '35', 'Type __vtype_mod1_M1t1 mod1::__vtab_mod1_M1t1;'
...

This is caused by this change in gdb output:
...
 (gdb) info module variables
    ...
 File gdb.fortran/info-types.f90:
-35:     Type m1t1 mod1::__def_init_mod1_M1t1;
+        Type m1t1 mod1::__def_init_mod1_M1t1;
-35:     Type __vtype_mod1_M1t1 mod1::__vtab_mod1_M1t1;
+        Type __vtype_mod1_M1t1 mod1::__vtab_mod1_M1t1;
 21:     real(kind=4) mod1::mod1_var_1;
 22:     integer(kind=4) mod1::mod1_var_2;
...
caused by a change in debug info.

Fix this by allowing those entries without line number.

Tested on x86_64-linux.

Committed to trunk.

Thanks,
- Tom

[gdb/testsuite] Fix gdb.fortran/info-modules.exp with gcc-8

gdb/testsuite/ChangeLog:

2020-07-21  Tom de Vries  <tdevries@suse.de>

	* gdb.fortran/info-modules.exp (info module variables): Allow missing
	line numbers for some variables.

---
 gdb/testsuite/gdb.fortran/info-modules.exp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdb/testsuite/gdb.fortran/info-modules.exp b/gdb/testsuite/gdb.fortran/info-modules.exp
index a3a9b2cb18..02e35c207e 100644
--- a/gdb/testsuite/gdb.fortran/info-modules.exp
+++ b/gdb/testsuite/gdb.fortran/info-modules.exp
@@ -117,9 +117,9 @@ GDBInfoModuleSymbols::check_entry "${srcfile2}" "mod2" "19" \
     "${integer4} mod2::mod2_var_1;"
 GDBInfoModuleSymbols::check_entry "${srcfile2}" "mod2" "20" \
     "${real4} mod2::mod2_var_2;"
-GDBInfoModuleSymbols::check_entry "${srcfile}" "mod1" "35" \
+GDBInfoModuleSymbols::check_entry "${srcfile}" "mod1" "(35)?" \
     "Type m1t1 mod1::__def_init_mod1_M1t1;"
-GDBInfoModuleSymbols::check_entry "${srcfile}" "mod1" "35" \
+GDBInfoModuleSymbols::check_entry "${srcfile}" "mod1" "(35)?" \
     "Type __vtype_mod1_M1t1 mod1::__vtab_mod1_M1t1;"
 GDBInfoModuleSymbols::check_entry "${srcfile}" "mod1" "21" \
     "${real4} mod1::mod1_var_1;"