Changes required for building on Solaris

Not suitable for upstream

--- a/python/mozbuild/mozbuild/virtualenv.py	2019-09-03 12:11:00.201672221 -0700
+++ b/python/mozbuild/mozbuild/virtualenv.py	2019-09-03 12:11:22.606931177 -0700
@@ -341,7 +341,7 @@
         # configure or a mozconfig activated in the current shell. We trust
         # Python is smart enough to find a proper compiler and to use the
         # proper compiler flags. If it isn't your Python is likely broken.
-        IGNORE_ENV_VARIABLES = ('CC', 'CXX', 'CFLAGS', 'CXXFLAGS', 'LDFLAGS',
+        IGNORE_ENV_VARIABLES = ('CFLAGS', 'CXXFLAGS', 'LDFLAGS',
             'PYTHONDONTWRITEBYTECODE')
 
         try:
--- a/js/src/gc/Memory.cpp	2021-01-21 07:39:51.031912920 -0800
+++ b/js/src/gc/Memory.cpp	2021-01-21 07:40:06.317075808 -0800
@@ -75,7 +75,7 @@
   return uintptr_t(p) % alignment;
 }
 
-void* TestMapAlignedPagesLastDitch(size_t size, size_t alignment) {
+static void* TestMapAlignedPagesLastDitch(size_t size, size_t alignment) {
   return MapAlignedPagesLastDitch(size, alignment);
 }
 
--- a/js/src/gc/Memory.h	2019-09-03 12:13:54.329641951 -0700
+++ b/js/src/gc/Memory.h	2019-09-03 12:14:02.775208969 -0700
@@ -41,7 +41,7 @@
 // Deallocate memory mapped content.
 void DeallocateMappedContent(void* p, size_t length);
 
-void* TestMapAlignedPagesLastDitch(size_t size, size_t alignment);
+static void* TestMapAlignedPagesLastDitch(size_t size, size_t alignment);
 
 void ProtectPages(void* p, size_t size);
 void MakePagesReadOnly(void* p, size_t size);
--- a/config/rules.mk	2019-09-03 12:17:16.488809595 -0700
+++ b/config/rules.mk	2019-09-03 12:21:36.305144558 -0700
@@ -326,7 +326,7 @@
 ifdef MOZ_IOS
 _LOADER_PATH := @rpath
 else
-_LOADER_PATH := @executable_path
+_LOADER_PATH := @(abspath$(prefix))/lib
 endif
 EXTRA_DSO_LDOPTS	+= -dynamiclib -install_name $(_LOADER_PATH)/$(SHARED_LIBRARY) -compatibility_version 1 -current_version 1 -single_module
 endif
--- a/js/src/old-configure	2019-09-03 14:09:43.678376289 -0700
+++ b/js/src/old-configure	2019-09-03 14:10:22.673543029 -0700
@@ -8818,7 +8818,7 @@
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_save_LIBS="$LIBS"
-LIBS="-lreadline  $LIBS"
+LIBS="-lreadline -lcurses $LIBS"
 cat > conftest.$ac_ext <<EOF
 #line 8824 "configure"
 #include "confdefs.h"
@@ -8846,7 +8846,7 @@
 fi
 if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
   echo "$ac_t""yes" 1>&6
-  EDITLINE_LIBS="-lreadline"
+  EDITLINE_LIBS="-lreadline -lcurses"
 else
   echo "$ac_t""no" 1>&6
 { echo "configure: error: No system readline library found." 1>&2; echo "configure: error: No system readline library found." 1>&5; exit 1; }
--- a/python/mozbuild/mozbuild/configure/__init__.py	2019-09-03 14:19:18.649976840 -0700
+++ b/python/mozbuild/mozbuild/configure/__init__.py	2019-09-03 14:17:12.900697323 -0700
@@ -421,7 +421,7 @@
         # All options should have been removed (handled) by now.
         for arg in self._helper:
             without_value = arg.split('=', 1)[0]
-            raise InvalidOptionError('Unknown option: %s' % without_value)
+            #raise InvalidOptionError('Unknown option: %s' % without_value)
 
         # Run the execution queue
         for func, args in self._execution_queue:
--- mozjs-60.8.0/js/src/wasm/WasmSignalHandlers.cpp.~1~	2019-07-01 11:07:44.000000000 +0000
+++ mozjs-60.8.0/js/src/wasm/WasmSignalHandlers.cpp	2021-05-12 10:41:45.880159326 +0000
@@ -46,6 +46,10 @@
 #endif
 #endif
 
+#if defined(__sun)
+#include <ucontext.h>  // for ucontext_t, mcontext_t
+#endif
+
 // Crashing inside the signal handler can cause the handler to be recursively
 // invoked, eventually blowing the stack without actually showing a crash
 // report dialog via Breakpad. To guard against this we watch for such
@@ -140,8 +144,8 @@
 #else
 #define XMM_sig(p, i) ((p)->uc_mcontext.fpregs.fp_reg_set.fpchip_state.xmm[i])
 #define EIP_sig(p) ((p)->uc_mcontext.gregs[REG_PC])
-#define EBP_sig(p) ((p)->uc_mcontext.gregs[REG_EBP])
-#define ESP_sig(p) ((p)->uc_mcontext.gregs[REG_ESP])
+#define EBP_sig(p) ((p)->uc_mcontext.gregs[REG_FP])
+#define ESP_sig(p) ((p)->uc_mcontext.gregs[REG_SP])
 #endif
 #define RIP_sig(p) ((p)->uc_mcontext.gregs[REG_RIP])
 #define RAX_sig(p) ((p)->uc_mcontext.gregs[REG_RAX])