这段时间make总是出现问题：
/usr/bin/ld:.libs/libixml.ver:2: ignoring invalid character `\033' in script
/usr/bin/ld:.libs/libixml.ver:2: ignoring invalid character `3' in script
/usr/bin/ld:.libs/libixml.ver:2: ignoring invalid character `1' in script
/usr/bin/ld:.libs/libixml.ver:2: ignoring invalid character `\033' in script
/usr/bin/ld:.libs/libixml.ver:2: syntax error in VERSION script
collect2: error: ld returned 1 exit status
/usr/bin/ld:.libs/libixml.ver:2: ignoring invalid character `3' in script
/usr/bin/ld:.libs/libixml.ver:2: ignoring invalid character `1' in script
/usr/bin/ld:.libs/libixml.ver:2: ignoring invalid character `\033' in script
/usr/bin/ld:.libs/libixml.ver:2: syntax error in VERSION script
collect2: error: ld returned 1 exit status
今天可算找到原因了，是因为在.zshrc中设置了GREP_OPTIONS为“--color=always"会出现make问题，去掉就好了。
Grep默认可能是--color=auto，检测到输出为终端时，会高亮匹配的字符串，当输出为pipe时关闭高亮。这样输出pipe到less中就不会高亮显示。
既然设置EREP_OPTIONS会出现编译问题，根据需要添加alias吧。
本文链接地址: GREP_OPTIONS导致无法make
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