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尝试在CentOS6.5 (x86_64)上从源代码配置/build gcc 4.9.1

./config看起来像：

mkdir ../gcc-build && cd ../gcc-build && ../gcc-4.9.1/configure 
LDFLAGS="-L/usr/local/lib, -L/usr/local/lib/cloog.isl, **-L/opt/x86_64/isl-0.12.2/lib**, 
-L/usr/local/lib/itcl4.0.1, -L/usr/local/lib/libffi-3.0.13, -L/usr/local/lib/pkgconfig, 
-L/usr/local/lib/sqlite3.8.6, -L/usr/local/lib/tcl8.6, -L/usr/local/lib/tdbc1.0.1, 
-L/usr/local/lib/tdbcmysql1.0.1, -L/usr/local/lib/tdbcodbc1.0.1, 
-L/usr/local/lib/tdbcpostgres1.0.1, -L/usr/local/lib/thread2.7.1, -L/usr/local/lib/tk8.6, 
-L/usr/local/lib64, -L/usr/lib64, -L/lib64, -L/usr/lib, -L/lib" CFLAGS="-I/usr/local/include, 
-I/usr/local/include/atomic_ops, -I/usr/local/include/autoopts, -I/usr/local/include/cloog, 
**-I/opt/x86_64/isl-0.12.2/include**, -I/usr/local/include/freetype2, -I/usr/local/include/gc, 
-I/usr/local/include/libpng16" --prefix=/opt/x86_64/gcc-4.9.1 --disable-multilib 
--disable-libada --with-system-zlib --with-libiconv-prefix=/usr/local/lib 
--with-mpc-include=/usr/local/include --with-mpc-lib=/usr/local/lib 
--with-mpfr-include=/usr/local/include --with-mpfr-lib=/usr/local/lib 
--with-gmp-include=/usr/local/include --with-gmp-lib=/usr/local/lib 
--with-isl=/opt/x86_64/isl-0.12.2 --with-cloog=/opt/x86_64/cloog-0.18.1 --disable-libsanitizer 
--disable-libssp --disable-libquadmath --disable-libquadmath-support --enable-shared 
--enable-threads=posix --enable-libstdcxx --enable-__cxa_atexit --enable-clocale=gnu 
--enable-languages=c,c++,objc,obj-c++

但它因以下原因而失败：

  • 检查 gmp/mpfr/mpc 库的正确版本...是的
  • 检查 ISL 0.10 版...否
  • 检查 ISL 0.11 版...否
  • 检查 ISL 0.12 版...否
  • 配置：错误：找不到可用的 ISL。有关详细信息，请参阅 config.log。

不确定如何声明 ISL 路径，它也在我的LD_LIBRARY_PATH中。

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