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Date:      Wed, 23 Oct 2019 15:36:22 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 241437] objcopy --add-section doesn't work
Message-ID:  <bug-241437-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241437

            Bug ID: 241437
           Summary: objcopy --add-section doesn't work
           Product: Base System
           Version: 12.0-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: arrowd@FreeBSD.org

I have created a simple C program:

# cat test.c 
int main(int argc, char* argv[]) {return 0;}

Now I want to embed some data (its own LLVM bitcode, specifically) as an ELF
section. I do:


# clang test.c -c -o test.c.o
# clang -emit-llvm -c test.c -o test.c.bc

Now, if I run

# objcopy --add-section .llvm_bc=test.c.bc test.c.o

I get 0 exit code, but the section doesn't get added:

# readelf -S test.c.o | grep llvm

However, if I **just run the same command twice**

# objcopy --add-section .llvm_bc=test.c.bc test.c.o

the section gets added successfully.

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