通配符函数返回版本3.81中的排序结果,但它在版本4.2中执行此操作.是否有任何编译/运行时开关来控制这个功能？
下面显示了两个版本的GNU make的结果.
$ls
a.mk a0.svp a1.svp a2.svp a3.svp a4.svp a5.svp a6.svp a7.svp a8.svp a9.svp
$cat a.mk
SVP_FILES := $(wildcard *.svp)
all:
@echo $(SVP_FILES)
$make -f a.mk all
a0.svp a1.svp **a2.svp a3.svp a4.svp a5.svp a6.svp a7.svp a8.svp a9.svp**
$~/sandBox/bin/make -f a.mk all
a0.svp a1.svp **a6.svp a5.svp a9.svp a4.svp a3.svp a2.svp a7.svp a8.svp**
$make –v | head -n 1
GNU Make 3.81
$~/sandBox/bin/make -v | head -n 1
GNU Make 4.2
解决方法
如
NEWS文件中所述
Version 3.82 (28 Jul 2010)
[…]
- WARNING: Backward-incompatibility!
Wildcards were not documented as returning sorted values,but the results
have been sorted up until this release.. If your makefiles require sorted
results from wildcard expansions,use the$(sort ...)function to request
it explicitly.
即SVP_FILES：= $(sort $(wildcard * .svp))
