Merge #6997: fix: use proper host objcopy/readelf

4d278c6 fix: shellcheck (pasta)
6700ca9 fix: use proper host objcopy/readelf (pasta)

Pull request description:

  ## Issue being fixed or feature implemented
  Our script didn't use host specific objcopy, so it would crash with not being able to interpret them depending on what we were building on and for.

  ## What was done?
  Use proper objcopy

  ## How Has This Been Tested?
  CI after: https://github.com/PastaPastaPasta/dash/actions/runs/19547578950
  CI before: https://github.com/PastaPastaPasta/dash/actions/runs/19544501408

  ## Breaking Changes

  ## Checklist:
    _Go over all the following points, and put an `x` in all the boxes that apply._
  - [ ] I have performed a self-review of my own code
  - [ ] I have commented my code, particularly in hard-to-understand areas
  - [ ] I have added or updated relevant unit/integration/functional/e2e tests
  - [ ] I have made corresponding changes to the documentation
  - [x] I have assigned this pull request to a milestone _(for repository code-owners and collaborators only)_

ACKs for top commit:
  UdjinM6:
    utACK 4d278c6
  kwvg:
    ACK 4d278c6

Tree-SHA512: 6e5a8095deb344187c73579105e30c03db8a834015d335b1c6df69c8d5da0de5157e1771486a123cfdf37b36970e89aabb56d95d5334d428181e84a1bbc1b9a8

Author: PastaPastaPasta

contrib/guix/libexec/build.sh

@@ -345,7 +345,7 @@ mkdir -p "$DISTSRC"
                 case "$HOST" in
                     *linux*)
                         # Compress DWARF sections in debug files and set proper permissions
-                        find "${DISTNAME}" -name "*.dbg" -type f -print0 | xargs -0 -P"$JOBS" -I{} sh -c "objcopy --compress-debug-sections=zlib \"\$1\" \"\$1.tmp\" && mv \"\$1.tmp\" \"\$1\" && chmod 644 \"\$1\"" _ {}
+                        find "${DISTNAME}" -name "*.dbg" -type f -print0 | xargs -0 -P"$JOBS" -I{} sh -c "${HOST}-objcopy --compress-debug-sections=zlib \"\$1\" \"\$1.tmp\" && mv \"\$1.tmp\" \"\$1\" && chmod 644 \"\$1\"" _ {}
 
                         # Create .build-id tree for perf auto-discovery
                         mkdir -p "${DISTNAME}/usr/lib/debug/.build-id"
@@ -354,7 +354,7 @@ mkdir -p "$DISTSRC"
                             find "${DISTNAME}/lib" -type f -print0
                         } | while IFS= read -r -d '' elf; do
                             if file "$elf" | grep -q "ELF.*executable\|ELF.*shared object"; then
-                                build_id=$(readelf -n "$elf" 2>/dev/null | awk '/Build ID/ {print $3; exit}')
+                                build_id=$("${HOST}"-readelf -n "$elf" 2>/dev/null | awk '/Build ID/ {print $3; exit}')
                                 if [ -n "$build_id" ] && [ -f "${elf}.dbg" ]; then
                                     dir="${DISTNAME}/usr/lib/debug/.build-id/${build_id:0:2}"
                                     mkdir -p "$dir"
@@ -374,13 +374,13 @@ mkdir -p "$DISTSRC"
                                 while IFS= read -r -d '' elf; do
                                     if file "$elf" | grep -q "ELF.*executable\|ELF.*shared object"; then
                                         # Check for build-id
-                                        if ! readelf -n "$elf" 2>/dev/null | grep -q "Build ID"; then
+                                        if ! "${HOST}"-readelf -n "$elf" 2>/dev/null | grep -q "Build ID"; then
                                             echo "ERROR: No build-id found in $elf" >&2
                                             verification_failed=1
                                         fi
 
                                         # Check for .gnu_debuglink
-                                        if ! readelf --string-dump=.gnu_debuglink "$elf" >/dev/null 2>&1; then
+                                        if ! "${HOST}"-readelf --string-dump=.gnu_debuglink "$elf" >/dev/null 2>&1; then
                                             echo "ERROR: No .gnu_debuglink found in $elf" >&2
                                             verification_failed=1
                                         fi