[RTEMS Project] #4987: QEMU 5.2.0 configure does not resolve gdbus_codegen correctly

[RTEMS trac]

#4987: QEMU 5.2.0 configure does not resolve gdbus_codegen correctly
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  Reporter:  Kinsey Moore  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  normal        |  Milestone:
 Component:  admin         |    Version:
  Severity:  normal        |   Keywords:
Blocked By:                |   Blocking:
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 When resolving gdbus_codegen from gio-2.0 packageconfig, the resulting
 binary name (gdbus-codegen) does not include a path. The configure script
 tests the binary name with -x which fails since that is not the name of a
 file in the current directory. This causes GDBUS_CODEGEN to be set to
 empty ("") in QEMU's generated config-host.mak which is consumed by meson
 which tries to run the present (but empty) contents and fails execution of
 nothing resulting in a confusing error message and a failure of the build.
 The patch that will soon be attached forces absolute path resolution of
 the contents of gdbus_codegen and omits emission of GDBUS_CODEGEN if
 gdbus_codegen is empty.

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Ticket URL: <http://devel.rtems.org/ticket/4987>
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