После добавления -fnested-functions в CFLAGS оно компилируется, но не собирается:
## Код:
```
/usr/bin/libtool --tag=CXX --mode=compile gcc -O2 -fnested-functions -no-cpp-precomp -DGC_DARWIN_THREADS -D_REENTRANT -Ilib/src -Iobj -Ilib/obj -Iobj -Ilib/obj -c /Users/kemiisto/Downloads/oo2c_32-2.1.11/lib/src/RT0.c -o lib/obj/RT0.lo
/usr/bin/libtool: unknown option character `-' in: --tag=CXX
Usage: /usr/bin/libtool -static [-] file [...] [-filelist listfile[,dirname]] [-arch_only arch] [-sacLT]
Usage: /usr/bin/libtool -dynamic [-] file [...] [-filelist listfile[,dirname]] [-arch_only arch] [-o output] [-install_name name] [-compatibility_version #] [-current_version #] [-seg1addr 0x#] [-segs_read_only_addr 0x#] [-segs_read_write_addr 0x#] [-seg_addr_table <filename>] [-seg_addr_table_filename <file_system_path>] [-all_load] [-noall_load]
make: *** [lib/obj/liboo2c.la] Error 1
```
