Unfortunately, the log file you provided doesn't tell me much more; it only contains:
configure:4943: checking whether compiler driver understands Ada configure:4966: result: no On my machine which also runs testing, I get: configure:4943: checking whether compiler driver understands Ada configure:4966: result: yes and the bootstrap succeeds. Since I cannot reproduce your problem, I'm afraid I can't help much more. I can however explain how this works so you can try to investigate further on your side. The package gnat only contains the symbolic link /usr/bin/gnatgcc -> gcc-4.3 thereby encoding the fact that gcc-4.3 is the default compiler driver. Driver? Yes. The role of gnatgcc or /usr/bin/gcc-4.3 (provided by package gcc-4.3), is to parse command line options and delegate the actual processing to several other executables. If the source language is C, the real compiler is /usr/lib/gcc/x86_64-linux-gnu/4.3/cc1, provided by package cpp-4.3. If the source language is Ada, the real compiler is /usr/lib/gcc/x86_64-linux-gnu/4.3/gnat1, provided by package gnat-4.3. The "1" in the name of the compiler executable means that it executes the first pass of compilation. For some languages (e.g. C++) there is a second pass. The output of the compiler is a temporary file containing assembly language. The compiler driver gnatgcc then calls /usr/bin/as (the assembler), provided by package binutils, which emits object files. For most languages (but not Ada), gcc-4.3 can then call the linker (/usr/bin/ld, also provided by package binutils) to link the object files into an executable or shared library. For Ada, a preliminary step called binding is necessary because Ada allows the programmer to control the order of elaboration (i.e. everything that the program does before reaching the first statement of the main procedure). The test which you can see at line 4943 in .../src/configure calls "gnatgcc -c conftest.adb" (where conftest.adb is a generated, minimalistic Ada source file) and then checks for the existence of the corresponding object file. In your case, something went wrong; either gnatgcc failed to produce an object file, or it emitted an error message on stderr. On my machine, the test succeeds. I hope you can take it from there to see what's wrong. -- Ludovic Brenta.
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