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[gdb/testsuite] Fix FAILs due to PR gcc/101452
When running test-case gdb.base/ptype-offsets.exp with gcc-11 (with -gdwarf-5 default) or gcc-10 with target board unix/gdb:debug_flags=-gdwarf-5 we run into this regression: ... (gdb) ptype/o static_member^M /* offset | size */ type = struct static_member {^M - static static_member Empty;^M /* 0 | 4 */ int abc;^M ^M /* total size (bytes): 4 */^M }^M -(gdb) PASS: gdb.base/ptype-offsets.exp: ptype/o static_member +(gdb) FAIL: gdb.base/ptype-offsets.exp: ptype/o static_member ... This is caused by missing debug info, which I filed as gcc PR101452 - "[debug, dwarf-5] undefined static member removed by -feliminate-unused-debug-symbols". It's not clear yet whether this is a bug or a feature, but work around this in the test-cases by: - defining the static member - adding additional_flags=-fno-eliminate-unused-debug-types. Tested on x86_64-linux. gdb/testsuite/ChangeLog: 2021-07-20 Tom de Vries <tdevries@suse.de> * lib/gdb.exp (gcc_major_version): New proc. * gdb.base/ptype-offsets.cc: Define static member static_member::Empty. * gdb.cp/templates.exp: Define static member using -DGCC_BUG. * gdb.cp/m-static.exp: Add additional_flags=-fno-eliminate-unused-debug-types. * gdb.cp/pr-574.exp: Same. * gdb.cp/pr9167.exp: Same.
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gdb/testsuite
@ -185,6 +185,9 @@ struct static_member
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int abc;
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};
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/* Work around PR gcc/101452. */
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static_member static_member::Empty;
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struct empty_member
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{
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struct { } empty;
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@ -31,8 +31,14 @@ if [get_compiler_info] {
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return -1
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}
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set flags [list debug c++]
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if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
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# Work around PR gcc/101452.
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lappend flags additional_flags=-fno-eliminate-unused-debug-types
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}
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if {[prepare_for_testing "failed to prepare" $testfile \
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[list $srcfile $srcfile2] {debug c++}]} {
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[list $srcfile $srcfile2] $flags]} {
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return -1
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}
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@ -32,7 +32,13 @@ if [get_compiler_info "c++"] {
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return -1
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}
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
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set flags [list debug c++]
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if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
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# Work around PR gcc/101452.
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lappend flags additional_flags=-fno-eliminate-unused-debug-types
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}
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile $flags]} {
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return -1
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}
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@ -15,7 +15,13 @@
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standard_testfile .cc
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
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set flags [list debug c++]
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if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
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# Work around PR gcc/101452.
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lappend flags additional_flags=-fno-eliminate-unused-debug-types
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}
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile $flags]} {
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return -1
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}
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@ -27,7 +27,13 @@ if [get_compiler_info "c++"] {
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return -1
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}
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
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set flags [list debug c++]
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if { [test_compiler_info gcc-*] && [gcc_major_version] >= 10 } {
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# Work around PR gcc/101452.
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lappend flags additional_flags=-DGCC_BUG
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}
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile $flags]} {
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return -1
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}
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@ -3998,6 +3998,27 @@ proc test_compiler_info { {compiler ""} } {
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return [string match $compiler $compiler_info]
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}
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# Return the gcc major version, or -1.
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# For gcc 4.8.5, the major version is 4.8.
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# For gcc 7.5.0, the major version 7.
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proc gcc_major_version { } {
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global compiler_info
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global decimal
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if { ![test_compiler_info "gcc-*"] } {
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return -1
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}
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set res [regexp gcc-($decimal)-($decimal)- $compiler_info \
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dummy_var major minor]
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if { $res != 1 } {
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return -1
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}
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if { $major >= 5} {
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return $major
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}
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return $major.$minor
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}
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proc current_target_name { } {
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global target_info
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if [info exists target_info(target,name)] {
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