dev-libs/nspr: fix build on loong

Patch applied here has been running on real loong hardware since late
2021, simple and no problems so far.

See: https://github.com/gentoo/gentoo/pull/25632
Acked-by: Joonas Niilola <juippis@gentoo.org>
Signed-off-by: WANG Xuerui <xen0n@gentoo.org>

2 files changed, 101 insertions, 0 deletions

diff --git a/dev-libs/nspr/files/nspr-4.33-loong.patch b/dev-libs/nspr/files/nspr-4.33-loong.patch
new file mode 100644
index 000000000000..96772a2767c0
--- /dev/null
+++ b/dev-libs/nspr/files/nspr-4.33-loong.patch
@@ -0,0 +1,100 @@
+https://phabricator.services.mozilla.com/D142407
+
+--- a/pr/include/md/_linux.h
++++ b/pr/include/md/_linux.h
+@@ -71,10 +71,12 @@
+ #define _PR_SI_ARCHITECTURE "microblaze"
+ #elif defined(__nds32__)
+ #define _PR_SI_ARCHITECTURE "nds32"
+ #elif defined(__xtensa__)
+ #define _PR_SI_ARCHITECTURE "xtensa"
++#elif defined(__loongarch64)
++#define _PR_SI_ARCHITECTURE "loongarch64"
+ #else
+ #error "Unknown CPU architecture"
+ #endif
+ #define PR_DLL_SUFFIX       ".so"
+ 
+@@ -139,10 +141,22 @@
+ #define _MD_ATOMIC_ADD                _PR_x86_64_AtomicAdd
+ extern PRInt32 _PR_x86_64_AtomicSet(PRInt32 *val, PRInt32 newval);
+ #define _MD_ATOMIC_SET                _PR_x86_64_AtomicSet
+ #endif
+ 
++#if defined(__loongarch__)
++#if defined(__GNUC__)
++/* Use GCC built-in functions */
++#define _PR_HAVE_ATOMIC_OPS
++#define _MD_INIT_ATOMIC()
++#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
++#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
++#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
++#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
++#endif
++#endif
++
+ #if defined(__or1k__)
+ #if defined(__GNUC__)
+ /* Use GCC built-in functions */
+ #define _PR_HAVE_ATOMIC_OPS
+ #define _MD_INIT_ATOMIC()
+--- a/pr/include/md/_linux.cfg
++++ b/pr/include/md/_linux.cfg
+@@ -1253,10 +1253,56 @@
+ #define PR_ALIGN_OF_WORD    8
+ 
+ #define PR_BYTES_PER_WORD_LOG2  3
+ #define PR_BYTES_PER_DWORD_LOG2 3
+ 
++#elif defined(__loongarch64)
++
++#undef  IS_BIG_ENDIAN
++#define IS_LITTLE_ENDIAN 1
++#define IS_64
++
++#define PR_BYTES_PER_BYTE   1
++#define PR_BYTES_PER_SHORT  2
++#define PR_BYTES_PER_INT    4
++#define PR_BYTES_PER_INT64  8
++#define PR_BYTES_PER_LONG   8
++#define PR_BYTES_PER_FLOAT  4
++#define PR_BYTES_PER_DOUBLE 8
++#define PR_BYTES_PER_WORD   8
++#define PR_BYTES_PER_DWORD  8
++
++#define PR_BITS_PER_BYTE    8
++#define PR_BITS_PER_SHORT   16
++#define PR_BITS_PER_INT     32
++#define PR_BITS_PER_INT64   64
++#define PR_BITS_PER_LONG    64
++#define PR_BITS_PER_FLOAT   32
++#define PR_BITS_PER_DOUBLE  64
++#define PR_BITS_PER_WORD    64
++
++#define PR_BITS_PER_BYTE_LOG2   3
++#define PR_BITS_PER_SHORT_LOG2  4
++#define PR_BITS_PER_INT_LOG2    5
++#define PR_BITS_PER_INT64_LOG2  6
++#define PR_BITS_PER_LONG_LOG2   6
++#define PR_BITS_PER_FLOAT_LOG2  5
++#define PR_BITS_PER_DOUBLE_LOG2 6
++#define PR_BITS_PER_WORD_LOG2   6
++
++#define PR_ALIGN_OF_SHORT   2
++#define PR_ALIGN_OF_INT     4
++#define PR_ALIGN_OF_LONG    8
++#define PR_ALIGN_OF_INT64   8
++#define PR_ALIGN_OF_FLOAT   4
++#define PR_ALIGN_OF_DOUBLE  8
++#define PR_ALIGN_OF_POINTER 8
++#define PR_ALIGN_OF_WORD    8
++
++#define PR_BYTES_PER_WORD_LOG2  3
++#define PR_BYTES_PER_DWORD_LOG2 3
++
+ #else
+ 
+ #error "Unknown CPU architecture"
+ 
+ #endif
+
diff --git a/dev-libs/nspr/nspr-4.33.ebuild b/dev-libs/nspr/nspr-4.33.ebuild
index 7be0ae41e449..679f81b80400 100644
--- a/dev-libs/nspr/nspr-4.33.ebuild
+++ b/dev-libs/nspr/nspr-4.33.ebuild
@@ -28,6 +28,7 @@ PATCHES=(
 	"${FILESDIR}"/${PN}-4.8.9-link-flags.patch
 	# We do not need to pass -L$libdir via nspr-config --libs
 	"${FILESDIR}"/${PN}-4.9.5_nspr_config.patch
+	"${FILESDIR}"/${PN}-4.33-loong.patch
 )
 
 src_prepare() {