[llvm-objcopy][test] Add a test to show that argv[0] is included in error/warning messages

test/llvm-objcopy/ELF/error-format.test is similar to test/llvm-readobj/error-format.test added in D66425.

Reviewed By: grimar, jhenderson

Differential Revision: https://reviews.llvm.org/D66476

llvm-svn: 369392

llvm/test/tools/llvm-objcopy/ELF/error-format.test

@@ -0,0 +1,20 @@
+## This test shows that we include the tool name in error/warning messages.
+
+# RUN: not llvm-objcopy %S/non-existent 2>&1 | FileCheck --check-prefix=ERR %s -DTOOL=objcopy
+# RUN: not llvm-strip %S/non-existent 2>&1 | FileCheck --check-prefix=ERR %s -DTOOL=strip
+
+# ERR: llvm-[[TOOL]]{{(\.exe)?}}: error: '{{.*}}': {{[Nn]}}o such file or directory
+
+## Currently llvm-objcopy does not issue warnings, so it is not tested.
+
+# RUN: yaml2obj %s -o %t
+# RUN: llvm-strip %t %t 2>&1 | FileCheck --check-prefix=WARN %s
+
+# WARN: llvm-strip{{(\.exe)?}}: warning: '{{.*}}' was already specified
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_DYN
+  Machine: EM_RISCV