Re: [EXTERNAL] Re: Build failure for lang/gcc9 on Linux

["Morgan, Iain (ARC-TN)[InuTeq, LLC]" <iain.morgan%nasa.gov@localhost>]

On 2/4/21, 14:04, "maya%NetBSD.org@localhost" <maya%NetBSD.org@localhost> wrote:

    On Mon, Feb 01, 2021 at 11:28:31PM +0000, Morgan, Iain (ARC-TN)[InuTeq, LLC] wrote:
    > Hello,
    > 
    > I'm attempting to build lang/gcc9 from the 2020Q4 release on Linux. Specifically, I've tried on SLES 15, RHEL 7, and CentOS 7. The failure is identical on all three platforms.
    > 
    > It appears as if /usr/include/dlfcn.h is not being included. Various symbols, such as RTLD_NOW, dlerror, and dlsym are not declared.
    > 
    > The problem is isolated to lang/gcc9; I am able to build both lang/gcc8 and lang/gcc10 on these platforms. Admittedly, I have to add --without-zstd to CONFIGURE_ARGS for RHEL/CentOS, but that is a separate issue.
    > 
    > -- 
    > Iain Morgan
    > 

    Hi Iain,

    rillig@ wanted to try something new with lang/gcc9 - it's really nice to
    have someone try to improve things, but the result turned out a good bit
    less portable.

    Are you looking into this because CentOS 7 ships an older compiler, and
    some packages pull in a newer compiler from pkgsrc, and that compiler is
    failing to build?

    trunk has a workaround for this, I guess it has been sitting in tree
    long enough that it's okay to backport it now.
    https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FNetBSD%2Fpkgsrc%2Fcommit%2Ff3cc7d125946162b1d270c7cdebc67b60be26d28&amp;data=04%7C01%7Ciain.morgan%40nasa.gov%7C92a97a2e080849a11d4c08d8c958e42c%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637480730927764354%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Y7GugWUxo77tXinmj6ZXjDgBfRMMBoX7SM9mVgy73jY%3D&amp;reserved=0

    I suspect that disabling fortify will also work around it
    (PKGSRC_USE_FORTIFY=no)

Thanks for the response. I just tried setting PKGSRC_USE_FORTIFY=no, but that did not alter the behaviour.

To clarify matters a little, on CentOS/RHEL I first build lang/gcc7 with USE_NATIVE_GCC=yes set and then build just under 1500 packages using that compiler. On SLES 15, the system compiler is already GCC 7.5, so I use that to build the same set of packages.

Our users have requested both GCC 9 and GCC 10, so I am attempting to use pkgsrc to build both of them. At least, lang/gcc10 builds withut too much hassle. I'll have to take a look at the update to gcc.mk.

Thanks,

-- 
Iain