如何确定在 Makefile 中调用 'ar' 的位置？

Question

我正在尝试在 OS X 上构建 Git。Git 依赖于 libidn2。 libidn2 2.0.0 失败：

make  all-am
make[3]: Entering directory '/Users/jwalton/Build-Scripts/libidn2-2.0.0/lib'
  CC       idna.lo
  CC       lookup.lo
  CC       decode.lo
  CC       register.lo
  CC       bidi.lo
  CC       version.lo
  CC       error.lo
  CC       punycode.lo
  CC       free.lo
  CC       data.lo
  CC       tr46map.lo
  CC       tables.lo
  CC       context.lo
  CCLD     libidn2.la
warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm: no name list
warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm: no name list
copying selected object files to avoid basename conflicts...
ar: temporary file: No such file or directory
Makefile:1027: recipe for target 'libidn2.la' failed
make[3]: *** [libidn2.la] Error 1
make[3]: Leaving directory '/Users/jwalton/Build-Scripts/libidn2-2.0.0/lib'
Makefile:955: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory '/Users/jwalton/Build-Scripts/libidn2-2.0.0/lib'
Makefile:1065: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/Users/jwalton/Build-Scripts/libidn2-2.0.0'
Makefile:974: recipe for target 'all' failed
make: *** [all] Error 2

我构建 libidn2 的方法找到了所有 Makefile 并修复了 AR 和 ARFLAGS：

if [[ "$IS_DARWIN" -ne "0" ]]; then
    for mfile in $(find "$PWD" -name 'Makefile'); do
        echo "Fixing Makefile $mfile"
        sed -i "" 's|AR = ar|AR = /usr/bin/libtool|g' "$mfile"
        sed -i "" 's|ARFLAGS = cr|ARFLAGS = -static -o|g' "$mfile"
    done
fi

我已确认它修复了所有 Makefile：

$ find $PWD -name Makefile -exec grep 'AR =' {} \; | egrep -iv 'amtar|char'
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool
AR = /usr/bin/libtool
ac_ct_AR = /usr/bin/libtool

我也尝试了AR="/usr/bin/libtool" ARFLAGS="-static -o" ./configure 和make AR="/usr/bin/libtool" ARFLAGS="-static -o"，但选择不兑现。它会产生额外的失败构建。

Makefile 调试支持相当糟糕，所以我不确定如何继续。 make -d 即使是最简单的任务也会失败，比如提供文件名和行号。 remake -d 产生同样无益的结果。别人写的大项目让情况更加恶化。

$ make -d
...
Putting child 0x7f9bf0c45cf0 (libidn2.la) PID 75531 on the chain.
Live child 0x7f9bf0c45cf0 (libidn2.la) PID 75531
  CCLD     libidn2.la
warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm: no name list
warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm: no name list
copying selected object files to avoid basename conflicts...
ar: temporary file: No such file or directory
Reaping losing child 0x7f9bf0c45cf0 PID 75531
Makefile:1027: recipe for target 'libidn2.la' failed

这是第 1027 行，不是对ar 的调用：

libidn2.la: $(libidn2_la_OBJECTS) $(libidn2_la_DEPENDENCIES) $(EXTRA_libidn2_la\
_DEPENDENCIES)
        $(AM_V_CCLD)$(libidn2_la_LINK) -rpath $(libdir) $(libidn2_la_OBJECTS) $\
(libidn2_la_LIBADD) $(LIBS)

如何找到ar 在Makefiles 集合中被调用的位置？

Answer 1

要简单了解失败的配方，您可以：

1. 回显规则（即回显 $(AM_V_CCLD)$(libidn2_la_LINK) ...）
2. 添加第二个无法停止 make 的命令

如果您需要其他帮助，请在此处报告这些更改后的 make 输出。

在您的情况下，使用 makefile 选项 --debug=m 可以提供帮助