[ATfE] Rebase picolibc patches (#225)

Recent upstream changes to picolibc mean the downstream patches no
longer apply due to the context around them changing:

* The retargetable locking condition was removed.
* Various `_HAVE_` symbols were changed to `__HAVE_`.
* `PREFER_SIZE_OVER_SPEED` changed to `__PREFER_SIZE_OVER_SPEED`.

The downstream modifications themselves remain unchanged.

Author: dcandler

arm-software/embedded/patches/picolibc/0001-Enable-libcxx-builds.patch

@@ -1,4 +1,4 @@
-From cf0324ab646a164ad5b3409e1147164e076b72d0 Mon Sep 17 00:00:00 2001
+From a59afdaf3697da7a1cfc62e0f957be780d6ae11a Mon Sep 17 00:00:00 2001
 From: Simi Pallipurath <[email protected]>
 Date: Thu, 14 Nov 2024 10:07:08 +0000
 Subject: Enable libcxx builds
@@ -11,12 +11,12 @@ libc++ builds.
  2 files changed, 15 insertions(+)
 
 diff --git a/meson.build b/meson.build
-index e62ac11ab..b3881d106 100644
+index f33d011b2..2c653de02 100644
 --- a/meson.build
 +++ b/meson.build
-@@ -1373,6 +1373,18 @@ if get_option('newlib-retargetable-locking') != get_option('newlib-multithread')
-   error('newlib-retargetable-locking and newlib-multithread must be set to the same value')
- endif
+@@ -1340,6 +1340,18 @@ NEWLIB_MAJOR_VERSION=4
+ NEWLIB_MINOR_VERSION=3
+ NEWLIB_PATCHLEVEL_VERSION=0
 
 +conf_data.set('_GNU_SOURCE', '',
 +        description: '''Enable GNU functions like strtof_l.
@@ -30,11 +30,11 @@ index e62ac11ab..b3881d106 100644
 +and extended character sets, so picolibc's small ctype is not compatible with it'''
 +)
 +
- conf_data.set('_HAVE_CC_INHIBIT_LOOP_TO_LIBCALL',
+ conf_data.set('__HAVE_CC_INHIBIT_LOOP_TO_LIBCALL',
  	      cc.has_argument('-fno-tree-loop-distribute-patterns'),
  	      description: 'Compiler flag to prevent detecting memcpy/memset patterns')
 diff --git a/picolibc.ld.in b/picolibc.ld.in
-index c6d2a7d66..b8cd3209b 100644
+index 0bcfe4ca8..c3055c49e 100644
 --- a/picolibc.ld.in
 +++ b/picolibc.ld.in
 @@ -69,6 +69,9 @@ SECTIONS

arm-software/embedded/patches/picolibc/0002-Define-picocrt_machines-for-AArch32-builds-as-well-a.patch

@@ -1,4 +1,4 @@
-From 8f32c696fa3531dd557f180c09bdb6bd2689cb1c Mon Sep 17 00:00:00 2001
+From e8c748ad0040ad6043b4d10db681f683344f896d Mon Sep 17 00:00:00 2001
 From: Simi Pallipurath <[email protected]>
 Date: Thu, 14 Nov 2024 10:12:33 +0000
 Subject: Define picocrt_machines for AArch32 builds as well as 64.