OS X系统下编译命令因冒号出现执行异常问题求助

Hey there! Let's break down why that gcc command is throwing an error on your old laptop. The message gcc: error: :: No such file or directory is a clear clue that there's a messed-up argument in your gcc call.

The Root Cause #

Looking at your gcc command, this segment is the problem:

-I/usr/local/opt/openblas/include:-I/usr/local/opt/openjdk/include :

There are two critical issues here:

1. You’re using a colon (:) to chain two -I include paths directly after one -I prefix. GCC doesn’t recognize this syntax—each include path needs its own -I flag, or if using an environment variable like CPATH, paths are colon-separated without the -I prefixes.
2. There’s an extra space followed by a colon ( :) at the end of that line. GCC interprets this standalone :: (from the colon in the path chain plus the extra colon) as a filename it’s supposed to compile, which obviously doesn’t exist.

Since you said this worked before, this is almost certainly a misconfigured environment variable (like CFLAGS, CPPFLAGS, or CPATH)—likely from a recent shell config change, conda/pipx environment tweak, or system update that messed up path formatting.

Step-by-Step Fixes #

Let’s walk through how to resolve this:

1. Check your environment variables
   Open your terminal and run these commands to spot broken formatting:

   echo $CFLAGS
   echo $CPPFLAGS
   echo $CPATH
   

   Look for lines with paths chained like -I...:-I... or trailing colons/spaces.

2. Temporarily fix variables for the current session
   If you find the problematic variable (say, CPATH), reset it with properly formatted paths:

   export CPATH="/usr/local/opt/openblas/include:/usr/local/opt/openjdk/include"
   

   For CFLAGS, use separate -I flags with spaces:

   export CFLAGS="-I/usr/local/opt/openblas/include -I/usr/local/opt/openjdk/include"
   

   Then try your pip command again.

3. Override variables directly in the pip install
   If you don’t want to adjust session-wide variables, pass corrected flags directly when installing the library:

   CFLAGS="-I/usr/local/opt/openblas/include -I/usr/local/opt/openjdk/include" pip install psutil
   

4. Fix permanent config files
   Check your shell configs (like ~/.bashrc, ~/.zshrc, or ~/.bash_profile) and conda environment scripts for lines setting these variables incorrectly. Correct the formatting to either:

   • Colon-separated paths without -I for CPATH/CPPFLAGS
   • Space-separated -I/path entries for CFLAGS

5. Verify the fix manually
   To confirm, adjust the broken segment in your original gcc command and run it directly. Change:

   -I/usr/local/opt/openblas/include:-I/usr/local/opt/openjdk/include :
   

   to:

   -I/usr/local/opt/openblas/include -I/usr/local/opt/openjdk/include
   

   If this runs without errors, you’ve confirmed the issue is fixed.

内容的提问来源于stack exchange，提问作者downer