[PATCH v2 1/3] config.sub: add managarm-{mlibc,kernel} targets

[Arsen Arsenović]

To achieve this, the `kernel' pseudo-OS value was added, intended to
identify targets requiring a kernel-specific compiler and base system.

Signed-off-by: Arsen Arsenović <arsen@aarsen.me>
---
Evening,

This is version 2 of the config.sub patch we sent in for Managarm.
This version locks down on the `kernel' pseudo-OS value so that it can only be
used with OSes that have a separate kernel target, as to not be too
generic/confusing.

Apologies for taking a while to submit v2, and thank you in advance.

 config.sub                | 25 ++++++++++++++++++++++---
 testsuite/config-sub.data |  9 +++++++++
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/config.sub b/config.sub
index fbaa37f..e65e0ac 100755
--- a/config.sub
+++ b/config.sub
@@ -145,7 +145,7 @@ case $1 in
                        nto-qnx* | linux-* | uclinux-uclibc* \
                        | uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | 
netbsd*-gnu* \
                        | netbsd*-eabi* | kopensolaris*-gnu* | cloudabi*-eabi* \
-                       | storm-chaos* | os2-emx* | rtmk-nova*)
+                       | storm-chaos* | os2-emx* | rtmk-nova* | managarm-*)
                                basic_machine=$field1
                                basic_os=$maybe_os
                                ;;
@@ -1341,6 +1341,10 @@ EOF
                kernel=linux
                os=`echo "$basic_os" | sed -e 's|linux|gnu|'`
                ;;
+       managarm*)
+               kernel=managarm
+               os=$(echo $basic_os | sed -e 's|managarm|mlibc|')
+               ;;
        *)
                kernel=
                os=$basic_os
@@ -1754,7 +1758,7 @@ case $os in
             | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
             | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
             | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
-            | fiwix* )
+            | fiwix* | mlibc* )
                ;;
        # This one is extra strict with allowed versions
        sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
@@ -1762,6 +1766,9 @@ case $os in
                ;;
        none)
                ;;
+       kernel* )
+               # Restricted further below
+               ;;
        *)
                echo Invalid configuration \`"$1"\': OS \`"$os"\' not 
recognized 1>&2
                exit 1
@@ -1776,12 +1783,24 @@ case $kernel-$os in
                ;;
        uclinux-uclibc* )
                ;;
-       -dietlibc* | -newlib* | -musl* | -relibc* | -uclibc* )
+       managarm-mlibc* )
+               ;;
+       managarm-kernel* )
+               ;;
+       -dietlibc* | -newlib* | -musl* | -relibc* | -uclibc* | -mlibc* )
                # These are just libc implementations, not actual OSes, and thus
                # require a kernel.
                echo "Invalid configuration \`$1': libc \`$os' needs explicit 
kernel." 1>&2
                exit 1
                ;;
+       -kernel* )
+               echo "Invalid configuration \`$1': -kernel must not appear on 
its own." 1>&2
+               exit 1
+               ;;
+       *-kernel* )
+               echo "Invalid configuration \`$1': Kernel \`$kernel' does not 
support -kernel." 1>&2
+               exit 1
+               ;;
        kfreebsd*-gnu* | kopensolaris*-gnu*)
                ;;
        vxworks-simlinux | vxworks-simwindows | vxworks-spe)
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index ed05281..ac06881 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -16,6 +16,9 @@ aarch64-bme                                   
aarch64-unknown-bme
 aarch64-elf                                    aarch64-unknown-elf
 aarch64-genode                                 aarch64-unknown-genode
 aarch64-linux                                  aarch64-unknown-linux-gnu
+aarch64-managarm                               aarch64-unknown-managarm-mlibc
+aarch64-managarm-kernel                                
aarch64-unknown-managarm-kernel
+aarch64-managarm-mlibc                         aarch64-unknown-managarm-mlibc
 aarch64-unknown-elf                            aarch64-unknown-elf
 aarch64-unknown-linux                          aarch64-unknown-linux-gnu
 aarch64-wrs-vxworks                            aarch64-wrs-vxworks
@@ -615,6 +618,9 @@ riscv-company-elf                           
riscv-company-elf
 riscv-company-hcos                             riscv-company-hcos
 riscv-elf                                      riscv-unknown-elf
 riscv-linux                                    riscv-unknown-linux-gnu
+riscv-managarm                                 riscv-unknown-managarm-mlibc
+riscv-managarm-kernel                          riscv-unknown-managarm-kernel
+riscv-managarm-mlibc                           riscv-unknown-managarm-mlibc
 riscv-twizzler                                 riscv-unknown-twizzler
 riscv-zephyr                                   riscv-unknown-zephyr
 riscv32                                                riscv32-unknown-none
@@ -842,6 +848,9 @@ x86_64-fuchsia                                      
x86_64-pc-fuchsia
 x86_64-genode                                  x86_64-pc-genode
 x86_64-glidix                                  x86_64-pc-glidix
 x86_64-linux-relibc                            x86_64-pc-linux-relibc
+x86_64-managarm                                        x86_64-pc-managarm-mlibc
+x86_64-managarm-kernel                         x86_64-pc-managarm-kernel
+x86_64-managarm-mlibc                          x86_64-pc-managarm-mlibc
 x86_64-nto                                     x86_64-pc-nto-qnx
 x86_64-os108                                   x86_64-pc-os108
 x86_64-pc-ptx                                  x86_64-pc-ptx
-- 
2.35.1