fix: correct machine, config, and C library references (verified by build test)

Critical corrections based on actual build test on 2026-03-01:

1. Machine: tqma6ulx-mba6ulx → tqma6ul-multi-mba6ulx
   (the -multi variant is the correct one for the MBa6ULx carrier)

2. Config: imx → mainline
   (TQMa6UL machines are NOT in the imx config, only in mainline)

3. Carrier: MBa6x → MBa6ULx
   (MBa6x is for the Quad/Dual, MBa6ULx is for the UltraLite)

4. C library: glibc 2.38 → musl 1.2+
   (BSP uses musl: TARGET_SYS=arm-tq-linux-musleabi)

5. README rewritten with verified build output

Verified: DISTRO=spaetzle 5.0.11, BB_VERSION=2.8.0

docs/01-analysis/2038-problem-analysis.md

@@ -50,7 +50,7 @@ The i.MX6 UltraLite (Cortex-A7) is a 32-bit processor:
 │  → Compiled with 64-bit time_t      │
 ├─────────────────────────────────────┤
 │  C Library (glibc)                  │
-│  → glibc 2.34+ with 64-bit time_t   │
+│  → musl 1.2+ with 64-bit time_t   │
 ├─────────────────────────────────────┤
 │  Linux Kernel                       │
 │  → 5.1+ with CONFIG_TIME_LOW_RES    │
@@ -69,7 +69,7 @@ Yocto Project 5.0 (Scarthgap) released April 2024 provides:
 | **GCC** | 13.x | Supports 64-bit time_t | ✅ |
 | **BitBake** | 2.6 | Build system support | ✅ |
 
-**Critical:** glibc 2.34+ uses 64-bit `time_t` BY DEFAULT for 32-bit ARM in Yocto.
+**Critical:** musl 1.2+ uses 64-bit `time_t` BY DEFAULT for 32-bit ARM in Yocto.
 
 ---
 
@@ -88,9 +88,9 @@ From TQ documentation:
 
 ### 3.2 Machine Configuration
 
-For TQMa6UL-AB on MBa6x:
+For TQMa6UL-AB on MBa6ULx:
 ```
-MACHINE = "tqma6ulx-mba6ulx"
+MACHINE = "tqma6ul-multi-mba6ulx"
 ```
 
 Verified supported features with kernel 6.6:
@@ -176,7 +176,7 @@ grep -r "time_t\|gettimeofday\|stime" ${IMAGE_ROOTFS}/usr/bin/
 ### 6.1 Findings
 
 1. **Yocto Scarthgap (5.0) is 2038-compliant** for 32-bit ARM
-2. **TQ BSP scarthgap.TQ.ARM.BSP.0006** uses compliant kernel 6.6 + glibc 2.38
+2. **TQ BSP scarthgap.TQ.ARM.BSP.0006** uses compliant kernel 6.6 + musl 1.2
 3. **Migration from PTXdist is mandatory** for systems operating beyond 2038
 4. **Offline mirror required** for software approval process
 

docs/02-mirror-creation/step-by-step-mirror-creation.md

@@ -15,10 +15,10 @@ Based on sticker analysis and code review:
 
 **Sticker:** TQMA6U-AB RK REV.0405  
 **Board:** TQMa6UL (NXP i.MX6 UltraLite, Cortex-A7, 32-bit)  
-**Carrier:** MBa6x  
+**Carrier:** MBa6ULx  
 **Code Reference:** `tqma6x` = generic i.MX6 family identifier in legacy codebase
 
-**Machine Configuration:** `tqma6ulx-mba6ulx`  
+**Machine Configuration:** `tqma6ul-multi-mba6ulx`  
 *Alternative (ci-meta-tq multi-config):* `tqma6qdl-multi-mba6x`
 
 ---
@@ -102,8 +102,8 @@ ls -la sources/
 ```bash
 cd ${UT_BASE}/ci-meta-tq
 ./ci/ls-configs --file
-./ci/ls-machines --file --config=imx
-# Should list tqma6ulx-mba6ulx and other machines
+./ci/ls-machines --file --config=mainline
+# Should list tqma6ul-multi-mba6ulx and other machines
 ```
 
 ---
@@ -120,7 +120,7 @@ mkdir -p ~/.yocto
 cat > ~/.yocto/site.conf <<'EOF'
 # UT Project Configuration
 # Build: UT (Universität/Projekt)
-# Target: TQMa6UL on MBa6x
+# Target: TQMa6UL on MBa6ULx
 # Date: 2026-03-01
 
 # Mirror directories (outside home for space)
@@ -141,13 +141,13 @@ sudo chown -R "$USER:$USER" /srv/yocto
 cd ${UT_BASE}/ci-meta-tq
 
 # Set machine for TQMa6UL
-export MACHINE=tqma6ulx-mba6ulx
+export MACHINE=tqma6ul-multi-mba6ulx
 
 # Alternative if using multi-config:
 # export MACHINE=tqma6qdl-multi-mba6x
 
 # Initialize build environment (creates build_ut directory)
-. ./setup-environment build_ut imx
+. ./setup-environment build_ut mainline
 
 # Verify configuration
 bitbake -e | grep -E "^MACHINE=|^DL_DIR=|^SSTATE_DIR="
@@ -163,8 +163,8 @@ This step downloads all required source packages for offline use:
 cd ${UT_BASE}/ci-meta-tq
 
 # Ensure environment is set
-export MACHINE=tqma6ulx-mba6ulx
-. ./setup-environment build_ut imx
+export MACHINE=tqma6ul-multi-mba6ulx
+. ./setup-environment build_ut mainline
 
 # Build the image (downloads all sources)
 bitbake tq-image-small-debug
@@ -221,7 +221,7 @@ Use TQ's provided script to populate the mirror:
 cd ${UT_BASE}/ci-meta-tq
 
 # Set machine and config
-export MACHINE=tqma6ulx-mba6ulx
+export MACHINE=tqma6ul-multi-mba6ulx
 
 # Fill mirror (downloads all git repos and tarballs)
 ci/fill_mirror build_ut imx
@@ -237,7 +237,7 @@ du -sh /srv/yocto/sstate-cache/
 
 ```bash
 cd ${UT_BASE}/ci-meta-tq
-. ./setup-environment build_ut imx
+. ./setup-environment build_ut mainline
 
 # Generate license manifest
 bitbake tq-image-small-debug -c do_populate_lic
@@ -281,7 +281,7 @@ cat > UT-mirror-package/build-instructions/README.txt <<'EOF'
 UT Yocto Mirror Package
 =======================
 
-Target: TQMa6UL on MBa6x (i.MX6 UltraLite)
+Target: TQMa6UL on MBa6ULx (i.MX6 UltraLite)
 Yocto: Scarthgap 5.0 LTS
 BSP: TQ scarthgap.TQ.ARM.BSP.0006
 Build: UT (Universität/Projekt)
@@ -375,7 +375,7 @@ Key packages to verify for military use:
 Before delivering mirror:
 
 - [ ] ci-meta-tq cloned with all submodules
-- [ ] MACHINE=tqma6ulx-mba6ulx configured
+- [ ] MACHINE=tqma6ul-multi-mba6ulx configured
 - [ ] Build "UT" completed successfully
 - [ ] /srv/yocto/downloads/ populated
 - [ ] /srv/yocto/premirror/ populated by ci/fill_mirror

docs/04-deployment/corporate-network-deployment.md

@@ -3,7 +3,7 @@
 **Document ID:** DEPLOY-CORP-001-REV2  
 **Date:** 2026-03-01  
 **Build Name:** UT (Universität/Projekt)  
-**Target:** TQMa6UL on MBa6x  
+**Target:** TQMa6UL on MBa6ULx  
 **Environment:** Air-gapped corporate network  
 
 ---
@@ -150,14 +150,14 @@ cd ${UT_BASE}/UT-mirror-package/sources/ci-meta-tq
 ls -la sources/
 
 # Set machine for TQMa6UL
-export MACHINE=tqma6ulx-mba6ulx
+export MACHINE=tqma6ul-multi-mba6ulx
 
 # Initialize build (creates build_ut)
-. ./setup-environment build_ut imx
+. ./setup-environment build_ut mainline
 
 # Verify configuration
 bitbake -e | grep "^MACHINE="
-# Should show: MACHINE="tqma6ulx-mba6ulx"
+# Should show: MACHINE="tqma6ul-multi-mba6ulx"
 ```
 
 ---
@@ -169,8 +169,8 @@ bitbake -e | grep "^MACHINE="
 ```bash
 # Ensure we're in build environment
 cd ${UT_BASE}/UT-mirror-package/sources/ci-meta-tq
-export MACHINE=tqma6ulx-mba6ulx
-. ./setup-environment build_ut imx
+export MACHINE=tqma6ul-multi-mba6ulx
+. ./setup-environment build_ut mainline
 
 # Verify no network access is attempted
 export BB_NO_NETWORK=1
@@ -204,8 +204,8 @@ bitbake -e virtual/kernel | grep CONFIG_COMPAT_32BIT_TIME
 ```bash
 # Enter build environment
 cd ${UT_BASE}/UT-mirror-package/sources/ci-meta-tq
-export MACHINE=tqma6ulx-mba6ulx
-. ./setup-environment build_ut imx
+export MACHINE=tqma6ul-multi-mba6ulx
+. ./setup-environment build_ut mainline
 
 # Build target image
 bitbake tq-image-small-debug