diff --git a/lib/i386/descr b/lib/i386/descr
index 6990bd44..62b08d76 100644
--- a/lib/i386/descr
+++ b/lib/i386/descr
@@ -13,6 +13,7 @@ var CPP_F=-D__unix -D__USG
 var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4 -b1:0x1880000
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-m10
 name be
 	from .m.g
 	to .s
diff --git a/lib/i86/descr b/lib/i86/descr
index 07c6d859..df14b87f 100644
--- a/lib/i86/descr
+++ b/lib/i86/descr
@@ -13,6 +13,7 @@ var CPP_F=-D__unix -D__USG
 var ALIGN=-a0:2 -a1:2 -a2:2 -a3:2
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-m8
 name be
 	from .m.g
 	to .s
diff --git a/lib/m68020/descr b/lib/m68020/descr
index 8a61e33a..31b5cbf9 100644
--- a/lib/m68020/descr
+++ b/lib/m68020/descr
@@ -12,6 +12,7 @@ var RT=lib/{M}/head_
 var CPP_F=-D__unix -D__USG -D__mc68020 -D__m68k -D__mc68000 -D__M68020
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml10
 # 410 align is the default
 var ALIGN=-a0:4 -a1:4 -a2:0x10000 -a3:4
 name be
diff --git a/lib/m68k2/descr b/lib/m68k2/descr
index e00f4a54..94a0baaa 100644
--- a/lib/m68k2/descr
+++ b/lib/m68k2/descr
@@ -12,6 +12,7 @@ var RT=lib/{M}/head_
 var CPP_F=-D__unix -D__mc68000 -D__m68k
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml10
 # 407 align is the default
 var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4
 name be
diff --git a/lib/m68k4/descr b/lib/m68k4/descr
index 8b8bbe4e..1782b26b 100644
--- a/lib/m68k4/descr
+++ b/lib/m68k4/descr
@@ -12,6 +12,7 @@ var RT=lib/{M}/head_
 var CPP_F=-D__unix -D__mc68000 -D__m68k
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml10
 # 407 align is the default
 var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4
 name be
diff --git a/lib/mantra/descr b/lib/mantra/descr
index 5bf130ec..1c47a6fa 100644
--- a/lib/mantra/descr
+++ b/lib/mantra/descr
@@ -13,6 +13,7 @@ var RT=lib/mantra/head_
 var CPP_F=-D__unix -D__USG -D__mc68000 -D__m68k
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml10
 # 407 align is the default
 var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4
 name be
diff --git a/lib/minix/descr b/lib/minix/descr
index 723c8b27..45b22a52 100644
--- a/lib/minix/descr
+++ b/lib/minix/descr
@@ -16,6 +16,7 @@ var ALIGN=-a0:2 -a1:16 -a2:2 -a3:2
 var CC_ALIGN=-VS2U2
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-m8
 name be
 	from .m.g
 	to .s
diff --git a/lib/minixST/descr b/lib/minixST/descr
index 7a7cee96..c2a847b7 100644
--- a/lib/minixST/descr
+++ b/lib/minixST/descr
@@ -15,6 +15,7 @@ var SYSINCLUDES=-I{EM}/lib/minixST/include -I{EM}/lib/minix/include
 var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml10
 name be
 	from .m.g
 	to .s
diff --git a/lib/pmds/descr b/lib/pmds/descr
index 8340a1f9..6eaf74af 100644
--- a/lib/pmds/descr
+++ b/lib/pmds/descr
@@ -14,6 +14,7 @@ var RT=lib/pmds/head_
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
 var CPP_F=-D__unix -D__m68000 -D__m68k
+var MACHOPT_F=-ml10
 # 407 align is the default
 var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4
 name be
diff --git a/lib/pmds4/descr b/lib/pmds4/descr
index e1f82194..1711c954 100644
--- a/lib/pmds4/descr
+++ b/lib/pmds4/descr
@@ -14,6 +14,7 @@ var RT=lib/pmds4/head_
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
 var CPP_F=-D__unix -D__m68000 -D__m68k
+var MACHOPT_F=-ml10
 # 407 align is the default
 var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4
 name be
diff --git a/lib/sparc/descr b/lib/sparc/descr
index 2722b7cc..e1015474 100644
--- a/lib/sparc/descr
+++ b/lib/sparc/descr
@@ -13,6 +13,7 @@ var CPP_F=-D__unix -D__sparc -D__BSD4_2 -D__sun
 var CC_ALIGN=-VS4 -S9
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml100
 name be
 	from .m.g
 	to .s
diff --git a/lib/sun2/descr b/lib/sun2/descr
index e787f789..c4bd2c6f 100644
--- a/lib/sun2/descr
+++ b/lib/sun2/descr
@@ -15,6 +15,7 @@ var MLIB=lib/{M}/tail_
 var CPP_F=-D__unix -D__m68k -D__M68010 -D__mc68010 -D__BSD4_2
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml10
 # 413 align is the default, rom in text
 var ALIGN=-a0:4 -a1:4 -a2:0x20000 -a3:4 -b0:0x2020
 name be
diff --git a/lib/sun3/descr b/lib/sun3/descr
index e2ee5e27..b923fef3 100644
--- a/lib/sun3/descr
+++ b/lib/sun3/descr
@@ -17,6 +17,7 @@ var CC_ALIGN=-Vw4.1 -S9
 var ALIGN=-a0:4 -a1:4 -a2:0x20000 -a3:4 -b0:0x2020
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml10
 name be
 	from .m.g
 	to .s
diff --git a/lib/vax4/descr b/lib/vax4/descr
index a1a99ed3..74e785f2 100644
--- a/lib/vax4/descr
+++ b/lib/vax4/descr
@@ -15,6 +15,7 @@ var CC_ALIGN=-Vw4.1
 var ALIGN=-a0:4 -a1:4 -a2:0x400 -a3:4
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
+var MACHOPT_F=-ml8
 name be
 	from .m.g
 	to .s
diff --git a/lib/xenix3/descr b/lib/xenix3/descr
index ada5d684..2d3f85d0 100644
--- a/lib/xenix3/descr
+++ b/lib/xenix3/descr
@@ -15,6 +15,7 @@ var CPP_F=-D__unix -D__USG
 var C_LIB={EM}/{LIB}cc.1s {EM}/{LIB}cc.2g
 var OLD_C_LIB={C_LIB}
 var ALIGN=-a0:2 -a1:2 -a2:2 -a3:2
+var MACHOPT_F=-m8
 name be
 	from .m.g
 	to .s