41 lines
934 B
C
41 lines
934 B
C
// this specific section contains before-main function pointers
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// this pragma ensures the compilation unit will generate this section
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#pragma section(".CRT$XCU", read)
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// declare the "before main" function
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static void run_before_main_func(void);
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// set the before-main execution function pointer
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__declspec(allocate(".CRT$XCU"))
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__pragma(comment(linker,"/include:run_before_main_ptr"))
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void (*run_before_main_ptr)(void) = run_before_main_func;
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// define the "before main" function
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int x = 0;
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static void run_before_main_func(void){
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x = 100;
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}
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// main
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#include <stdio.h>
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int main(){
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printf("x = %d\n", x);
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return(0);
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}
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#if 0
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// wrapped in a macro:
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#define BEFORE_MAIN(n) static void n(void); \
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__declspec(allocate(".CRT$XCU")) \
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__pragma(comment(linker,"/include:" #n "__")) \
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void (*n##__)(void) = n; \
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static void n(void)
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BEFORE_MAIN(before_main_rule){
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// do work here
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}
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#endif
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