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Lines 19-25
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| 19 |
# before reporting errors to developers. |
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# before reporting errors to developers. |
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# |
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# |
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-# Please refer to the GCC manual for a list of possible values. |
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-# Please refer to the GCC manual for a list of possible values. |
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+# -mtarget=<cpu-type> for PowerPC64 systems instructs the gcc compiler that |
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+# -mtune=<cpu-type> for PowerPC64 systems instructs the gcc compiler that |
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+# it can use instruction scheduling specific for that type of processor |
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+# it can use instruction scheduling specific for that type of processor |
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+# specified |
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+# specified |
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+# |
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+# |
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Lines 27-33
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+# to optimize your code for. Code generated under those options will run best |
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+# to optimize your code for. Code generated under those options will run best |
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+# on that processor. |
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+# on that processor. |
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+# |
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+# |
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+# -mcpu=<cpu-type> and -mtarget=<cpu-type> should both be specified |
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+# -mcpu=<cpu-type> and -mtune=<cpu-type> should both be specified |
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+# |
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+# |
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+# GCC 3.x supports many ppc64 processor types including: power3, power4, |
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+# GCC 3.x supports many ppc64 processor types including: power3, power4, |
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+# 970 (aka G5), and power5. |
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+# 970 (aka G5), and power5. |
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Lines 47-57
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| 47 |
+# good selection. |
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+# good selection. |
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+# |
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+# |
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+#Example CFLAGS setting |
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+#Example CFLAGS setting |
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+#CFLAGS="-O2 -pipe -mcpu=970 -mtarget=970 -maltivec -mabi=altivec" |
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+#CFLAGS="-O2 -pipe -mcpu=970 -mtune=970 -maltivec -mabi=altivec" |
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+# |
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+# |
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+#or |
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+#or |
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+# |
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+# |
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+#CFLAGS="-O2 -pipe -mcpu=power3 -mtarget=power3" |
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+#CFLAGS="-O2 -pipe -mcpu=power3 -mtune=power3" |
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# |
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# |
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# If you set a CFLAGS above, then this line will set your default C++ flags to |
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# If you set a CFLAGS above, then this line will set your default C++ flags to |
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# the same settings. |
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# the same settings. |
