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I'm having an issue compiling a simple C program with a custom header file I wrote.

Specs:

• macOS Mojave (v. 10.14.4)


• Geany IDE (v. 1.33)

Problem

Build Command: gcc -Wall -o "%e" "%f"

When I start my build command (Geany button) I get the following error:

gcc -Wall -o "main" "main.c" -v (in directory: /Users/brandonwilliams/C programs)

Apple LLVM version 10.0.1 (clang-1001.0.46.3)

Target: x86_64-apple-darwin18.5.0

Thread model: posix

InstalledDir: /Library/Developer/CommandLineTools/usr/bin

 "/Library/Developer/CommandLineTools/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.14.0 -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim -fno-strict-return -masm-verbose -munwind-tables -target-sdk-version=10.14 -target-cpu penryn -dwarf-column-info -debugger-tuning=lldb -target-linker-version 450.3 -v -resource-dir /Library/Developer/CommandLineTools/usr/lib/clang/10.0.1 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -I/usr/local/include -Wall -Wno-atomic-implicit-seq-cst -Wno-framework-include-private-from-public -Wno-atimport-in-framework-header -Wno-quoted-include-in-framework-header -fdebug-compilation-dir /Users/brandonwilliams/C programs -ferror-limit 19 -fmessage-length 0 -stack-protector 1 -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fobjc-runtime=macosx-10.14.0 -fmax-type-align=16 -fdiagnostics-show-option -o /var/folders/86/0128w64d3nq3q14rwrfm1zfc0000gn/T/main-64bc1e.o -x c main.c

clang -cc1 version 10.0.1 (clang-1001.0.46.3) default target x86_64-apple-darwin18.5.0

ignoring nonexistent directory "/usr/local/include"

ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/local/include"

ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/Library/Frameworks"

#include "..." search starts here:

#include <...> search starts here:

 /Library/Developer/CommandLineTools/usr/lib/clang/10.0.1/include

 /Library/Developer/CommandLineTools/usr/include

 /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include

 /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks (framework directory)

End of search list.

 "/Library/Developer/CommandLineTools/usr/bin/ld" -demangle -lto_library /Library/Developer/CommandLineTools/usr/lib/libLTO.dylib -no_deduplicate -dynamic -arch x86_64 -macosx_version_min 10.14.0 -syslibroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -o main /var/folders/86/0128w64d3nq3q14rwrfm1zfc0000gn/T/main-64bc1e.o -L/usr/local/lib -lSystem /Library/Developer/CommandLineTools/usr/lib/clang/10.0.1/lib/darwin/libclang_rt.osx.a

Undefined symbols for architecture x86_64:

  "_radius2Volume", referenced from:

      _main in main-64bc1e.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

Compilation failed.

I did my homework and found that if I ran the following in terminal then everything plays nice:

gcc main.c simple.c -o main

How should I formulate my build commands in Geany to handle future header file issues?

I know I'm still learning how to make header files for C programs and I appreciate any constructive criticism. Thanks!