gcc works just fine with clang

.travis.yml

@@ -12,7 +12,7 @@ notifications:
     on_failure: always
 
 ## Use the container-based infrastructure
-sudo: false
+sudo: required
 dist: trusty
 python:
   - 2.7
@@ -75,7 +75,6 @@ matrix:
           - gdb
     - compiler: gcc
       env: REAL_CC=gcc-5     REAL_CXX=g++-5   LDFLAGS="-fuse-ld=gold"
-      sudo: true
       addons:
         apt:
           sources:
@@ -88,7 +87,6 @@ matrix:
           - gdb
     - compiler: gcc
       env: REAL_CC=gcc-6     REAL_CXX=g++-6   LDFLAGS="-fuse-ld=gold"
-      sudo: true
       addons:
         apt:
           sources:
@@ -101,7 +99,6 @@ matrix:
           - gdb
     - compiler: gcc
       env: REAL_CC=gcc-6     REAL_CXX=g++-6  REAL_EXTRA=-fsanitize=address  FORCE_TESTER='' ASAN_OPTIONS=detect_leaks=0   LDFLAGS="-fuse-ld=gold"
-      sudo: true
       addons:
         apt:
           sources:

Makefile.in

@@ -504,11 +504,6 @@ DTEST_STAMPS := $(patsubst bin/tests/%.elf,stamp/run-%.stamp,${DTEST_BINARIES})
 ${DTEST_OBJS}: override CXXFLAGS += -g -O0 -gdwarf-3
 ${DTEST_STAMPS}: override TESTER=${GDB} -return-child-result -nx -batch -ex 'python file_to_load = "$<"' -x ${SRC_DIR}/tools/debug-debug.gdb --args false
 ${DTEST_STAMPS}: tools/debug-debug.gdb
-ifeq '$(findstring clang,${CXX})' 'clang'
-${DTEST_STAMPS}:
-	@echo "Error: sorry, but clang can't be used with gdb"
-	-false
-endif
 
 test: test-direct
 test-direct: $(patsubst bin/tests/%.elf,stamp/run-%.stamp,${TEST_BINARIES})