--- spack-src/src/libfastx/fastx.h.org	2019-12-19 12:05:37.497936486 +0900
+++ spack-src/src/libfastx/fastx.h	2019-12-19 13:44:55.481837853 +0900
@@ -58,7 +58,7 @@
 	OUTPUT_SAME_AS_INPUT=3
 } OUTPUT_FILE_TYPE;
 
-#pragma pack(1) 
+#pragma pack(push, 1) 
 typedef struct 
 {
 	/* Record data - common for FASTA/FASTQ */
@@ -115,6 +115,7 @@
 	FILE*	input;
 	FILE*	output;
 } FASTX ;
+#pragma pack(pop)
 
 
 void fastx_init_reader(FASTX *pFASTX, const char* filename,