[debuginfo-tests][dexter] Add --builder gcc support for POSIX

Differential Revision: https://reviews.llvm.org/D75339

debuginfo-tests/dexter/dex/builder/scripts/posix/gcc.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -e
+
+if test -z "$PATHTOGCC"; then
+  PATHTOGCC=gcc
+fi
+
+for INDEX in $SOURCE_INDEXES
+do
+  CFLAGS=$(eval echo "\$COMPILER_OPTIONS_$INDEX")
+  SRCFILE=$(eval echo "\$SOURCE_FILE_$INDEX")
+  OBJFILE=$(eval echo "\$OBJECT_FILE_$INDEX")
+  $PATHTOGCC -std=gnu++11 -c $CFLAGS $SRCFILE -o $OBJFILE
+done
+
+$PATHTOGCC $LINKER_OPTIONS $OBJECT_FILES -o $EXECUTABLE_FILE

debuginfo-tests/dexter/dex/tools/clang_opt_bisect/Tool.py

@@ -77,6 +77,13 @@ def _get_bisect_limits(self):
 
         return limits
 
+    def handle_options(self, defaults):
+        options = self.context.options
+        if "clang" not in options.builder.lower():
+            raise Error("--builder %s is not supported by the clang-opt-bisect tool - only 'clang' is "
+                        "supported " % options.builder)
+        super(Tool, self).handle_options(defaults)
+
     def _run_test(self, test_name):  # noqa
         options = self.context.options
 
@@ -177,7 +184,7 @@ def _run_test(self, test_name):  # noqa
                 file_name = ''.join(
                     c for c in file_name
                     if c.isalnum() or c in '()-_./ ').strip().replace(
-                        ' ', '_').replace('/', '_')
+                    ' ', '_').replace('/', '_')
 
                 output_text_path = os.path.join(options.results_directory,
                                                 '{}.txt'.format(file_name))
@@ -188,7 +195,7 @@ def _run_test(self, test_name):  # noqa
                         heuristic_verbose_output + '\n', stream=Stream(fp))
 
                 output_dextIR_path = os.path.join(options.results_directory,
-                                                '{}.dextIR'.format(file_name))
+                                                  '{}.dextIR'.format(file_name))
                 with open(output_dextIR_path, 'wb') as fp:
                     pickle.dump(steps, fp, protocol=pickle.HIGHEST_PROTOCOL)
 
@@ -229,7 +236,6 @@ def _handle_results(self) -> ReturnCode:
                                  self._all_bisect_pass_summary)
         return ReturnCode.OK
 
-
     def _clang_opt_bisect_build(self, opt_bisect_limits):
         options = self.context.options
         compiler_options = [