--- a/external/pdfium/debian-ports.diff	2024-03-04 21:33:17.133064736 +0100
+++ b/external/pdfium/debian-ports.diff	2024-03-05 16:52:13.688932548 +0100
@@ -0,0 +1,28 @@
+--- build/build_config.h	2024-03-05 16:50:08.624785549 +0100
++++ build/build_config.h	2024-03-05 16:50:55.616839071 +0100
+@@ -350,6 +350,25 @@
+ #define ARCH_CPU_RISCV64 1
+ #define ARCH_CPU_64_BITS 1
+ #define ARCH_CPU_LITTLE_ENDIAN 1
++#elif defined(__sparc__)
++#define ARCH_CPU_BIG_ENDIAN 1
++#if defined(__arch64__)
++#define ARCH_CPU_64_BITS 1
++#else
++#define ARCH_CPU_32_BITS 1
++#endif
++#elif defined(__m68k__)
++#define ARCH_CPU_32_BITS 1
++#define ARCH_CPU_BIG_ENDIAN 1
++#elif defined(__hppa__)
++#define ARCH_CPU_32_BITS 1
++#define ARCH_CPU_BIG_ENDIAN 1
++#elif defined(__alpha__)
++#define ARCH_CPU_64_BITS 1
++#define ARCH_CPU_LITTLE_ENDIAN 1
++#elif defined(__ia64__)
++#define ARCH_CPU_64_BITS 1
++#define ARCH_CPU_LITTLE_ENDIAN 1
+ #else
+ #error Please add support for your architecture in build/build_config.h
+ #endif
--- a/external/pdfium/UnpackedTarball_pdfium.mk	2024-03-05 16:54:17.425089179 +0100
+++ b/external/pdfium/UnpackedTarball_pdfium.mk	2024-03-05 16:54:31.949108078 +0100
@@ -18,6 +18,8 @@
 
 pdfium_patches += system-abseil.diff
 
+pdfium_patches += debian-ports.diff
+
 $(eval $(call gb_UnpackedTarball_UnpackedTarball,pdfium))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,pdfium,$(PDFIUM_TARBALL)))