Initial armv7 support.

[RussellHaley]

This pull request is just to get comments.

Sooo. I essentially copied over the Aarch64 files, added the appropriate machine dependant files and renamed "a couple of structs".
Next I ran gcc -dM -E - < /dev/null and copied that into c2mir/armv7/mirc_armv7_linux.h. I built and ran but I received an error. It did not segfault.

I am using a different build tool called xmake, the build file is stashed in my russellhaley/mircVM project.

Output:

debian@beaglebone:~/git/mircVM/build/linux/armv7a/release$ ls
b2ctab  b2m  c2m  cvm  libmir.a  m2b  run-test.lua  sieve.mir
debian@beaglebone:~/git/mircVM/build/linux/armv7a/release$ lua run-test.lua
File: /home/debian/git/mircVM//files/C/sieve.c
pwd; ./c2m -S -o sieve.mir /home/debian/git/mircVM//files/C/sieve.c; ./cvm sieve.mir
/home/debian/git/mircVM/build/linux/armv7a/release
<environment>:55:9: standard macro __has_include redefinition
<environment>:11:9: warning -- different macro redefinition of __STDC_VERSION__
stdint.h:44:9: warning -- different macro redefinition of __INT64_C
stdint.h:45:9: warning -- different macro redefinition of __UINT64_C
/usr/include/stdio.h:27:10: error in opening file bits/libc-header-start.h
Failed to get the module items
That's all folks.

[RussellHaley]

This is the current message:

debian@beaglebone:~/git/mircVM/build/linux/armv7a/release$ ./c2m -v -S -o sieve.mir /home/debian/git/mircVM//files/C/sieve.c;
C2MIR init end           -- 3635 usec
/usr/include/stdio.h:27:10: error in opening file bits/libc-header-start.h

Stackoverflow implies this is a 64/32 bit issue:
https://stackoverflow.com/questions/54082459/fatal-error-bits-libc-header-start-h-no-such-file-or-directory-while-compili

I'll dig again tomorrow or Monday. Cheers!

[lygstate]

Good job

[RussellHaley]

This change causes the following warning on Ubuntu 20 64 bit VM:

osboxes@osboxes ~/g/m/mir ((299fa499…))> make -j 10
gcc -I. -MMD -MP -g -std=gnu11 -Wno-abi -fsigned-char -fno-tree-sra -fno-ipa-cp-clone -O3 -DNDEBUG -DMIR_PARALLEL_GEN -c mir.c -o mir.o
gcc -I. -MMD -MP -g -std=gnu11 -Wno-abi -fsigned-char -fno-tree-sra -fno-ipa-cp-clone -O3 -DNDEBUG -DMIR_PARALLEL_GEN -c mir-gen.c -o mir-gen.o
gcc -I. -MMD -MP -g -std=gnu11 -Wno-abi -fsigned-char -fno-tree-sra -fno-ipa-cp-clone -O3 -DNDEBUG -DMIR_PARALLEL_GEN -c c2mir/c2mir.c -o c2mir/c2mir.o
gcc -I. -MMD -MP -g -std=gnu11 -Wno-abi -fsigned-char -fno-tree-sra -fno-ipa-cp-clone -O3 -DNDEBUG -DMIR_PARALLEL_GEN -c c2mir/c2mir-driver.c -o c2mir/c2mir-driver.o
gcc -I. -MMD -MP -g -std=gnu11 -Wno-abi -fsigned-char -fno-tree-sra -fno-ipa-cp-clone -O3 -DNDEBUG -DMIR_PARALLEL_GEN -c mir-utils/m2b.c -o mir-utils/m2b.o
gcc -I. -MMD -MP -g -std=gnu11 -Wno-abi -fsigned-char -fno-tree-sra -fno-ipa-cp-clone -O3 -DNDEBUG -DMIR_PARALLEL_GEN -c mir-utils/b2m.c -o mir-utils/b2m.o
gcc -I. -MMD -MP -g -std=gnu11 -Wno-abi -fsigned-char -fno-tree-sra -fno-ipa-cp-clone -O3 -DNDEBUG -DMIR_PARALLEL_GEN -c mir-utils/b2ctab.c -o mir-utils/b2ctab.o
mir-gen.c: In function ‘print_code’:
mir-gen.c:5206:12: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 7 has type ‘long unsigned int’ [-Wformat=]
 5206 |            "gcc -c -o %s.o %s 2>&1 && objcopy --update-section .text=%s %s.o && objdump "
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
......
 5209 |            cfname, cfname, bfname, cfname, (uintptr_t) start_addr, cfname, cfname, cfname,
      |                                            ~~~~~~~~~~~~~~~~~~~~~~
      |                                            |
      |                                            long unsigned int
mir-gen.c:5207:31: note: format string is defined here
 5207 |            "--adjust-vma=0x%llx -d %s.o; rm -f "
      |                            ~~~^
      |                               |
      |                               long long unsigned int
      |                            %lx
mir-gen.c: In function ‘MIR_gen’:
mir-gen.c:5389:14: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 5 has type ‘long unsigned int’ [-Wformat=]
 5389 |              "Generation of code for %s: %lu MIR insns (addr=%llx, len=%lu) -- time %.2f ms\n",
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
......
 5392 |              (uintptr_t) machine_code, (unsigned long) code_len,
      |              ~~~~~~~~~~~~~~~~~~~~~~~~
      |              |
      |              long unsigned int
mir-gen.c:109:29: note: in definition of macro ‘DEBUG’
  109 |     if (debug_file != NULL) code; \
      |                             ^~~~
mir-gen.c:5389:65: note: format string is defined here
 5389 |              "Generation of code for %s: %lu MIR insns (addr=%llx, len=%lu) -- time %.2f ms\n",
      |                                                              ~~~^
      |                                                                 |
      |                                                                 long long unsigned int
      |                                                              %lx
ar rcs libmir.a mir.o mir-gen.o c2mir/c2mir.o
gcc  c2mir/c2mir.o c2mir/c2mir-driver.o libmir.a -lm -ldl -lpthread -o c2m
gcc  mir-utils/m2b.o libmir.a -lm -ldl -lpthread -o m2b ./libmir.a
gcc  mir-utils/b2m.o libmir.a -lm -ldl -lpthread -o b2m ./libmir.a
gcc  mir-utils/b2ctab.o libmir.a -lm -ldl -lpthread -o b2ctab  ./libmir.a

[RussellHaley]

This change causes a warning on 64 bit Ubuntu 20. (see comment above)

[RussellHaley]

A surprising number of the tests that build with cmake run correctly. Anyway, I'll leave it at that until you can come up for air. Fun stuff!