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Date: Sat, 11 Nov 2017 11:18:50 -0800 (PST)
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Subject: How to create a GPR project for ARM Cortex?
From: =?UTF-8?B?Sm9oYW4gU8O2ZGVybGluZCDDhXN0csO2bQ==?= <johaa1993@gmail.com>
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Xref: feeder.eternal-september.org comp.lang.ada:48823
Date: 2017-11-11T11:18:50-08:00
List-Id: <comp.lang.ada>

I build programs on my stm32l0 using this script:

arm-none-eabi-gcc -c -mcpu=3Dcortex-m0plus -mthumb -Og -Wall -fdata-section=
s -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/main.d" -MT"build/mai=
n.d" -Wa,-a,-ad,-alms=3Dbuild/main.lst src/main.c -o build/main.o
arm-none-eabi-gcc -x assembler-with-cpp -c -mcpu=3Dcortex-m0plus -mthumb -O=
g -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build=
/startup_stm32l072xx.d" -MT"build/startup_stm32l072xx.d" src/startup_stm32l=
072xx.s -o build/startup_stm32l072xx.o
arm-none-eabi-gcc build/startup_stm32l072xx.o build/main.o -mcpu=3Dcortex-m=
0plus -mthumb -specs=3Dnano.specs -Tsrc/STM32L072CZEx_FLASH.ld  -lc -lm -ln=
osys -Wl,-Map=3Dbuild/main.map,--cref -Wl,--gc-sections -o build/main.elf
arm-none-eabi-objcopy -O ihex build/main.elf build/main.hex
arm-none-eabi-objcopy -O binary -S build/main.elf build/main.bin
cp build/main.bin E:/


I want to convert it to a GPR project so I created this:

project Default is

   for Languages use ("c");
   --for Languages use ("c, s");
   for Source_Dirs use ("src");
   for Object_Dir use "obj";
   for Exec_Dir use "bin";
   for Main use ("main.c");
   for Target use "arm-eabi";
   for Library_Support  use "none";
  =20
   package Ide is
      for Gnat use "arm-eabi-gnat";
      for Gnatlist use "arm-eabi-gnatls";
      for Debugger_Command use "arm-eabi-gdb";
   end Ide;
  =20
   package Builder is
      for Default_Switches ("c") use ("-mcpu=3Dcortex-m0", "-mthumb", "-Og"=
, "-Wall", "-fdata-sections", "-ffunction-sections", "-g", "-gdwarf-2", "-M=
MD", "-MP", "-MF""build/main.d""", "-MT""build/main.d""", "-Wa,-a,-ad,-alms=
=3Dbuild/main.lst");
   end Builder;
  =20
   package Compiler is
      for Default_Switches ("c") use ("-mcpu=3Dcortex-m0", "-mthumb", "-Og"=
, "-Wall", "-fdata-sections", "-ffunction-sections", "-g", "-gdwarf-2", "-M=
MD", "-MP", "-MF""build/main.d""", "-MT""build/main.d""", "-Wa,-a,-ad,-alms=
=3Dbuild/main.lst");
   end Compiler;
  =20
   package Linker is
      for Linker_Options use ("-mcpu=3Dcortex-m0plus", "-mthumb", "-specs=
=3Dnano.specs", "-Tsrc/STM32L072CZEx_FLASH.ld", "-lc", "-lm", "-lnosys", "-=
Wl,-Map=3Dbuild/main.map,--cref", "-Wl,--gc-sections");
   end Linker;
  =20
end Default;


I got following result:
c:/gnat/2017/bin/../lib/gcc/arm-eabi/6.3.1/../../../../arm-eabi/bin/ld.exe:=
 cannot find crt0.o: No such file or directory

I got following result by using assembly language s:
no compiler specified for language "s"

I do not need crt0.o, how to remove that?
Is it even possible to use ".s" or ".ld" files in a GPR project?