[Bug 1896096] Re: Git version: Build process is broken in block_curl.c.o

[Toolybird]

Chiming in here as the user who initially suggested Arch use this:

--extra-ldflags="$LDFLAGS"

qemu-5.0.0 introduced a breaking change whereby LDFLAGS from the
environment were ignored. For Arch, this resulted in exclusion of `--as-
needed' from the link, which naturally caused dependency chaos.

The Arch Build System globally sets CFLAGS and LDFLAGS in the build
environment to try and ensure all pkgs are built to distro standards.
The build systems for most pkgs in the distro respect FLAGS from the
environment.

When qemu-5.2.0 is released, Arch will obviously need to adapt to
account for Meson changes.

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https://bugs.launchpad.net/bugs/1896096

Title:
  Git version: Build process is broken in block_curl.c.o

Status in QEMU:
  Invalid

Bug description:
  Gcc version: 10.2.0
  Glusterfs: 8.1
  Libguestfs: 1.42

  Configure options used:

  configure \
      --prefix=/usr \
      --sysconfdir=/etc \
      --localstatedir=/var \
      --libexecdir=/usr/lib/qemu \
      --extra-ldflags="$LDFLAGS" \
      --smbd=/usr/bin/smbd \
      --enable-modules \
      --enable-sdl \
      --disable-werror \
      --enable-slirp=system \
      --enable-xfsctl \
      --audio-drv-list="pa alsa sdl"
      
  Error log attached. Here is the beginning:

  /usr/bin/ld: /usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/../../../../lib/Scrt1.o: 
in function `_start':
  (.text+0x24): undefined reference to `main'
  /usr/bin/ld: libblock-curl.a(block_curl.c.o): in function `curl_block_init':

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