Hi, how about my (unreviewed) patch for PR 96612 at https://gcc.gnu.org/pipermail/gcc-patches/2020-August/551900.html ?
That one also tries to solve the CXX_FOR_BUILD issue with an older GCC. Would that solve your issue as well? Tobias On 8/20/20 4:19 PM, Ilya Leoshkevich via Gcc-patches wrote:
On Thu, 2020-08-20 at 13:59 +0100, Vasee Vinayagamoorthy wrote:Hello, After commit [1] ("Redefine NULL to nullptr"), building gcc fails when $CXX_FOR_BUILD is not using C++11 mode by default. This happens with gcc-4.8 which is still supported. This patch fixes this by adding -std=c++11 or its equivalent to $CXX_FOR_BUILD using AX_CXX_COMPILE_STDCXX(11). Tested by successful cross native build for aarch64-none-linux-gnu target. OK for trunk? ChangeLog: 2020-08-20 Ilya Leoshkevich <i...@linux.ibm.com> Vasee Vinayagamoorthy < vaseeharan.vinayagamoor...@arm.com> PR target/95700 * configure: Regenerate. * configure.ac: Require C++11 for building code generation tools. Regards Vasee Vinayagamoorthy PS: I do not have commit rights, therefore could I request someone to commit it on my behalf if this patch is approved. Thanks in advance. [1] https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=d59a576b8b5e12c3a56f0262912090e2921f5daaHi! First of all, sorry about losing track of this issue. Regarding your addition to the patch, I fear that CXX="$CXX -std=c++11" might break some rarely used compilers. But doing this portably is exactly what AX_CXX_COMPILE_STDCXX(11) is for. Do you know why isn't it working for you? Best regards, Ilya
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