fatal error: openssl/conf.h: No such file or directory | Home-brew OpenSSL on MacOS

Question = It seems like **gcc can't read the headers in the include folder** of OpeenSSL. Shouldn't the flags I added in the ~/.zprofile help with finding that, though? What am I missing? --- Original Task - Compile this C program . It will use OpenSSL to encrypt/decrypt using AES-256-GCB. Issue - When I try to run gcc Evp-gcm-encrypt.c -o Evp-gcm-encrypt I get Evp-gcm-encrypt.c:1:10: fatal error: openssl/conf.h: No such file or directory 1 | #include | ^~~~~~~~~~~~~~~~ compilation terminated. What I tried - 1. I **installed OpenSSL** through Home-brew. brew update brew install openssl@1.1 2. Added such lines both in my **~/.zprofile** and **~/.zshrc** export PATH="/usr/local/opt/openssl@1.1/bin:$PATH" export LDFLAGS="-L/usr/local/opt/openssl@1.1/lib" export CPPFLAGS="-I/usr/local/opt/openssl@1.1/include" 3. Removed and re-installed the **Xcode command-line-tools** sudo rm -rf /Library/Developer/CommandLineTools xcode-select --install 4. Deactivated **Anaconda's OpenSSL** (it was being executed before the home-brew version) conda deactivate 5. **Linking** OpenSSL brew link --force openssl but I get Error: No such keg: /usr/local/Cellar/openssl 6. **Linking** OpenSSL@1.1 brew link --force openssl@1.1 but I get Warning: Refusing to link macOS provided/shadowed software: openssl@1.1 If you need to have openssl@1.1 first in your PATH, run: echo 'export PATH="/usr/local/opt/openssl@1.1/bin:$PATH"' >> ~/.zshrc For compilers to find openssl@1.1 you may need to set: export LDFLAGS="-L/usr/local/opt/openssl@1.1/lib" export CPPFLAGS="-I/usr/local/opt/openssl@1.1/include" For pkg-config to find openssl@1.1 you may need to set: export PKG_CONFIG_PATH="/usr/local/opt/openssl@1.1/lib/pkgconfig" System info - 1. MacOS 12.5.1 (Monterey) 2. MacBook Air (Retina, 13-inch, 2018) 3. SIP disabled 4. Security set to none